21876746715 has 12 divisors (see below), whose sum is σ = 37919694384. Its totient is φ = 11667598224.

The previous prime is 21876746711. The next prime is 21876746719. The reversal of 21876746715 is 51764767812.

It is an interprime number because it is at equal distance from previous prime (21876746711) and next prime (21876746719).

It is not a de Polignac number, because 21876746715 - 2² = 21876746711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21876746711) 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, 243074919 + ... + 243075008.

It is an arithmetic number, because the mean of its divisors is an integer number (3159974532).

Almost surely, 2^21876746715 is an apocalyptic number.

21876746715 is a deficient number, since it is larger than the sum of its proper divisors (16042947669).

21876746715 is a wasteful number, since it uses less digits than its factorization.

21876746715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486149938 (or 486149935 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 21876746715 in words is "twenty-one billion, eight hundred seventy-six million, seven hundred forty-six thousand, seven hundred fifteen".