20510021352 has 64 divisors (see below), whose sum is σ = 55714867200. Its totient is φ = 6267913920.

The previous prime is 20510021339. The next prime is 20510021377. The reversal of 20510021352 is 25312001502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711318 + ... + 739589.

It is an arithmetic number, because the mean of its divisors is an integer number (870544800).

Almost surely, 2^20510021352 is an apocalyptic number.

It is an amenable number.

20510021352 is an abundant number, since it is smaller than the sum of its proper divisors (35204845848).

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

20510021352 is a wasteful number, since it uses less digits than its factorization.

20510021352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450966 (or 1450962 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20510021352 its reverse (25312001502), we get a palindrome (45822022854).

The spelling of 20510021352 in words is "twenty billion, five hundred ten million, twenty-one thousand, three hundred fifty-two".