21953274783 has 24 divisors (see below), whose sum is σ = 32271324288. Its totient is φ = 13264746000.

The previous prime is 21953274769. The next prime is 21953274809. The reversal of 21953274783 is 38747235912.

It is not a de Polignac number, because 21953274783 - 2⁴ = 21953274767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21953274583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28798 + ... + 211508.

It is an arithmetic number, because the mean of its divisors is an integer number (1344638512).

Almost surely, 2^21953274783 is an apocalyptic number.

21953274783 is a deficient number, since it is larger than the sum of its proper divisors (10318049505).

21953274783 is a wasteful number, since it uses less digits than its factorization.

21953274783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183067 (or 183056 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 21953274783 in words is "twenty-one billion, nine hundred fifty-three million, two hundred seventy-four thousand, seven hundred eighty-three".