21277276874 has 16 divisors (see below), whose sum is σ = 38620939968. Its totient is φ = 8582430912.

The previous prime is 21277276873. The next prime is 21277276877. The reversal of 21277276874 is 47867277212.

It is a super-2 number, since 2×21277276874² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21277276871) 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 7 ways as a sum of consecutive naturals, for example, 44699924 + ... + 44700399.

It is an arithmetic number, because the mean of its divisors is an integer number (2413808748).

Almost surely, 2^21277276874 is an apocalyptic number.

21277276874 is a deficient number, since it is larger than the sum of its proper divisors (17343663094).

21277276874 is a wasteful number, since it uses less digits than its factorization.

21277276874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89400349.

The product of its digits is 3687936, while the sum is 53.

The spelling of 21277276874 in words is "twenty-one billion, two hundred seventy-seven million, two hundred seventy-six thousand, eight hundred seventy-four".