21377875086 has 48 divisors (see below), whose sum is σ = 46461358944. Its totient is φ = 7104056832.

The previous prime is 21377875039. The next prime is 21377875087. The reversal of 21377875086 is 68057877312.

21377875086 is a `hidden beast` number, since 21 + 37 + 7 + 87 + 508 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21377875087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12029430 + ... + 12031206.

It is an arithmetic number, because the mean of its divisors is an integer number (967944978).

Almost surely, 2^21377875086 is an apocalyptic number.

21377875086 is an abundant number, since it is smaller than the sum of its proper divisors (25083483858).

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

21377875086 is a wasteful number, since it uses less digits than its factorization.

21377875086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3462 counting only the distinct ones).

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

The spelling of 21377875086 in words is "twenty-one billion, three hundred seventy-seven million, eight hundred seventy-five thousand, eighty-six".