20634152 has 128 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 7257600.

The previous prime is 20634143. The next prime is 20634161. The reversal of 20634152 is 25143602.

It is an interprime number because it is at equal distance from previous prime (20634143) and next prime (20634161).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479843 + ... + 479885.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^20634152 is an apocalyptic number.

20634152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20634152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26611200).

20634152 is an abundant number, since it is smaller than the sum of its proper divisors (32588248).

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

20634152 is a wasteful number, since it uses less digits than its factorization.

20634152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20634152 is about 4542.4830214322. The cubic root of 20634152 is about 274.2808848149.

Adding to 20634152 its reverse (25143602), we get a palindrome (45777754).

The spelling of 20634152 in words is "twenty million, six hundred thirty-four thousand, one hundred fifty-two".