20152704 has 128 divisors (see below), whose sum is σ = 63060480. Its totient is φ = 5621760.

The previous prime is 20152703. The next prime is 20152739. The reversal of 20152704 is 40725102.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20152704² = 812262957023232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54729 + ... + 55095.

It is an arithmetic number, because the mean of its divisors is an integer number (492660).

Almost surely, 2^20152704 is an apocalyptic number.

20152704 is a gapful number since it is divisible by the number (24) 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 20152704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31530240).

20152704 is an abundant number, since it is smaller than the sum of its proper divisors (42907776).

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

20152704 is a wasteful number, since it uses less digits than its factorization.

20152704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20152704 is about 4489.1763164304. The cubic root of 20152704 is about 272.1308482321.

Adding to 20152704 its reverse (40725102), we get a palindrome (60877806).

The spelling of 20152704 in words is "twenty million, one hundred fifty-two thousand, seven hundred four".