20755504 has 80 divisors (see below), whose sum is σ = 53139456. Its totient is φ = 7603200.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755504 is 40555702.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20449 + ... + 21439.

Almost surely, 2^20755504 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 20755504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26569728).

20755504 is an abundant number, since it is smaller than the sum of its proper divisors (32383952).

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

20755504 is a wasteful number, since it uses less digits than its factorization.

20755504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 20755504 is about 4555.8208920018. The cubic root of 20755504 is about 274.8175274344.

The spelling of 20755504 in words is "twenty million, seven hundred fifty-five thousand, five hundred four".