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20670552 = 23357331
BaseRepresentation
bin100111011011…
…0100001011000
31102220011200000
41032312201120
520242424202
62015013000
7340461000
oct116664130
942804600
1020670552
1110739101
126b0a160
1343896c6
142a61000
151c3491c
hex13b6858

20670552 has 192 divisors, whose sum is σ = 69888000. Its totient is φ = 5715360.

The previous prime is 20670547. The next prime is 20670557. The reversal of 20670552 is 25507602.

20670552 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (20670547) and next prime (20670557).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 666777 + ... + 666807.

It is an arithmetic number, because the mean of its divisors is an integer number (364000).

Almost surely, 220670552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20670552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34944000).

20670552 is an abundant number, since it is smaller than the sum of its proper divisors (49217448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20670552 is an equidigital number, since it uses as much as digits as its factorization.

20670552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20670552 is about 4546.4878752725. The cubic root of 20670552 is about 274.4420732377.

The spelling of 20670552 in words is "twenty million, six hundred seventy thousand, five hundred fifty-two".