20964354536 has 32 divisors (see below), whose sum is σ = 39573567360. Its totient is φ = 10411483392.

The previous prime is 20964354517. The next prime is 20964354553. The reversal of 20964354536 is 63545346902.

It is a super-2 number, since 2×20964354536² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686256 + ... + 2694048.

It is an arithmetic number, because the mean of its divisors is an integer number (1236673980).

Almost surely, 2^20964354536 is an apocalyptic number.

It is an amenable number.

20964354536 is a deficient number, since it is larger than the sum of its proper divisors (18609212824).

20964354536 is a wasteful number, since it uses less digits than its factorization.

20964354536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025 (or 10021 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 20964354536 in words is "twenty billion, nine hundred sixty-four million, three hundred fifty-four thousand, five hundred thirty-six".