21337577676 has 72 divisors (see below), whose sum is σ = 60115189680. Its totient is φ = 6341815296.

The previous prime is 21337577671. The next prime is 21337577699. The reversal of 21337577676 is 67677573312.

21337577676 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 7 + 577 + 67 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (21337577671) 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, 905881 + ... + 929136.

It is an arithmetic number, because the mean of its divisors is an integer number (834933190).

Almost surely, 2^21337577676 is an apocalyptic number.

It is an amenable number.

21337577676 is an abundant number, since it is smaller than the sum of its proper divisors (38777612004).

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

21337577676 is a wasteful number, since it uses less digits than its factorization.

21337577676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835063 (or 1835058 counting only the distinct ones).

The product of its digits is 7779240, while the sum is 54.

The spelling of 21337577676 in words is "twenty-one billion, three hundred thirty-seven million, five hundred seventy-seven thousand, six hundred seventy-six".