20521032512 has 14 divisors (see below), whose sum is σ = 40721424018. Its totient is φ = 10260516224.

The previous prime is 20521032451. The next prime is 20521032523. The reversal of 20521032512 is 21523012502.

It can be written as a sum of positive squares in only one way, i.e., 19673989696 + 847042816 = 140264^2 + 29104^2 .

It is a super-2 number, since 2×20521032512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160320503 + ... + 160320630.

Almost surely, 2^20521032512 is an apocalyptic number.

It is an amenable number.

20521032512 is a deficient number, since it is larger than the sum of its proper divisors (20200391506).

20521032512 is an equidigital number, since it uses as much as digits as its factorization.

20521032512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320641145 (or 320641135 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 20521032512 in words is "twenty billion, five hundred twenty-one million, thirty-two thousand, five hundred twelve".