21662971058 has 16 divisors (see below), whose sum is σ = 34699311360. Its totient is φ = 10120630800.

The previous prime is 21662971051. The next prime is 21662971067. The reversal of 21662971058 is 85017926612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21662971051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6022388 + ... + 6025983.

It is an arithmetic number, because the mean of its divisors is an integer number (2168706960).

Almost surely, 2^21662971058 is an apocalyptic number.

21662971058 is a deficient number, since it is larger than the sum of its proper divisors (13036340302).

21662971058 is a wasteful number, since it uses less digits than its factorization.

21662971058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12048433.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 21662971058 in words is "twenty-one billion, six hundred sixty-two million, nine hundred seventy-one thousand, fifty-eight".