21976858075 has 12 divisors (see below), whose sum is σ = 27831120480. Its totient is φ = 17207411360.

The previous prime is 21976858073. The next prime is 21976858147. The reversal of 21976858075 is 57085867912.

It is not a de Polignac number, because 21976858075 - 2¹ = 21976858073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21976858073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9350680 + ... + 9353029.

It is an arithmetic number, because the mean of its divisors is an integer number (2319260040).

Almost surely, 2^21976858075 is an apocalyptic number.

21976858075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21976858075 is a deficient number, since it is larger than the sum of its proper divisors (5854262405).

21976858075 is a wasteful number, since it uses less digits than its factorization.

21976858075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18703766 (or 18703761 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 21976858075 in words is "twenty-one billion, nine hundred seventy-six million, eight hundred fifty-eight thousand, seventy-five".