20725203264 has 112 divisors (see below), whose sum is σ = 57450264576. Its totient is φ = 6585638400.

The previous prime is 20725203223. The next prime is 20725203269. The reversal of 20725203264 is 46230252702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725203269) 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, 372799 + ... + 424769.

Almost surely, 2^20725203264 is an apocalyptic number.

20725203264 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 20725203264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28725132288).

20725203264 is an abundant number, since it is smaller than the sum of its proper divisors (36725061312).

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

20725203264 is a wasteful number, since it uses less digits than its factorization.

20725203264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52084 (or 52074 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

Adding to 20725203264 its reverse (46230252702), we get a palindrome (66955455966).

The spelling of 20725203264 in words is "twenty billion, seven hundred twenty-five million, two hundred three thousand, two hundred sixty-four".