21677824053 has 24 divisors (see below), whose sum is σ = 32009717376. Its totient is φ = 14130648000.

The previous prime is 21677824037. The next prime is 21677824061. The reversal of 21677824053 is 35042877612.

21677824053 is a `hidden beast` number, since 2 + 167 + 7 + 82 + 405 + 3 = 666.

It is not a de Polignac number, because 21677824053 - 2⁴ = 21677824037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21677824253) 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, 420193 + ... + 468953.

It is an arithmetic number, because the mean of its divisors is an integer number (1333738224).

Almost surely, 2^21677824053 is an apocalyptic number.

It is an amenable number.

21677824053 is a deficient number, since it is larger than the sum of its proper divisors (10331893323).

21677824053 is a wasteful number, since it uses less digits than its factorization.

21677824053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49865 (or 49862 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 21677824053 in words is "twenty-one billion, six hundred seventy-seven million, eight hundred twenty-four thousand, fifty-three".