20942558616 has 32 divisors (see below), whose sum is σ = 59835882240. Its totient is φ = 5983588128.

The previous prime is 20942558599. The next prime is 20942558653. The reversal of 20942558616 is 61685524902.

It is a super-2 number, since 2×20942558616² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62328876 + ... + 62329211.

It is an arithmetic number, because the mean of its divisors is an integer number (1869871320).

Almost surely, 2^20942558616 is an apocalyptic number.

It is an amenable number.

20942558616 is an abundant number, since it is smaller than the sum of its proper divisors (38893323624).

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

20942558616 is a wasteful number, since it uses less digits than its factorization.

20942558616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124658103 (or 124658099 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 20942558616 in words is "twenty billion, nine hundred forty-two million, five hundred fifty-eight thousand, six hundred sixteen".