20942924832 has 36 divisors (see below), whose sum is σ = 59556443310. Its totient is φ = 6980974848.

The previous prime is 20942924831. The next prime is 20942924843. The reversal of 20942924832 is 23842924902.

It can be written as a sum of positive squares in only one way, i.e., 18658467216 + 2284457616 = 136596^2 + 47796^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20942924832² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20942924831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36358957 + ... + 36359532.

Almost surely, 2^20942924832 is an apocalyptic number.

It is an amenable number.

20942924832 is an abundant number, since it is smaller than the sum of its proper divisors (38613518478).

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

20942924832 is a wasteful number, since it uses less digits than its factorization.

20942924832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72718505 (or 72718494 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 20942924832 in words is "twenty billion, nine hundred forty-two million, nine hundred twenty-four thousand, eight hundred thirty-two".