20922789887946 has 32 divisors (see below), whose sum is σ = 47576369776320. Its totient is φ = 6812071125552.

The previous prime is 20922789887929. The next prime is 20922789887947. The reversal of 20922789887946 is 64978898722902.

20922789887946 is a `hidden beast` number, since 209 + 227 + 8 + 9 + 88 + 79 + 46 = 666.

It is not an unprimeable number, because it can be changed into a prime (20922789887947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4505335725 + ... + 4505340368.

It is an arithmetic number, because the mean of its divisors is an integer number (1486761555510).

Almost surely, 2^{20922789887946} is an apocalyptic number.

20922789887946 is an abundant number, since it is smaller than the sum of its proper divisors (26653579888374).

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

20922789887946 is a wasteful number, since it uses less digits than its factorization.

20922789887946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010676147 (or 9010676141 counting only the distinct ones).

The product of its (nonzero) digits is 3511517184, while the sum is 81.

The spelling of 20922789887946 in words is "twenty trillion, nine hundred twenty-two billion, seven hundred eighty-nine million, eight hundred eighty-seven thousand, nine hundred forty-six".