21887076807 has 24 divisors (see below), whose sum is σ = 31700371248. Its totient is φ = 14551891200.

The previous prime is 21887076787. The next prime is 21887076821. The reversal of 21887076807 is 70867078812.

It is not a de Polignac number, because 21887076807 - 2⁸ = 21887076551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21887076857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6127332 + ... + 6130902.

It is an arithmetic number, because the mean of its divisors is an integer number (1320848802).

Almost surely, 2^21887076807 is an apocalyptic number.

21887076807 is a deficient number, since it is larger than the sum of its proper divisors (9813294441).

21887076807 is a wasteful number, since it uses less digits than its factorization.

21887076807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 54.

The spelling of 21887076807 in words is "twenty-one billion, eight hundred eighty-seven million, seventy-six thousand, eight hundred seven".