20764533510 has 72 divisors (see below), whose sum is σ = 62802133056. Its totient is φ = 4746178080.

The previous prime is 20764533457. The next prime is 20764533511. The reversal of 20764533510 is 1533546702.

20764533510 is a `hidden beast` number, since 2 + 0 + 7 + 645 + 3 + 3 + 5 + 1 + 0 = 666.

It is a super-3 number, since 3×20764533510³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764533511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2349846 + ... + 2358665.

It is an arithmetic number, because the mean of its divisors is an integer number (872251848).

Almost surely, 2^20764533510 is an apocalyptic number.

20764533510 is an abundant number, since it is smaller than the sum of its proper divisors (42037599546).

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

20764533510 is a wasteful number, since it uses less digits than its factorization.

20764533510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708538 (or 4708528 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The spelling of 20764533510 in words is "twenty billion, seven hundred sixty-four million, five hundred thirty-three thousand, five hundred ten".