21385760583 has 24 divisors (see below), whose sum is σ = 31390128000. Its totient is φ = 12941254480.

The previous prime is 21385760581. The next prime is 21385760639. The reversal of 21385760583 is 38506758312.

It is not a de Polignac number, because 21385760583 - 2¹ = 21385760581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21385760581) 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, 194518 + ... + 283916.

It is an arithmetic number, because the mean of its divisors is an integer number (1307922000).

Almost surely, 2^21385760583 is an apocalyptic number.

21385760583 is a deficient number, since it is larger than the sum of its proper divisors (10004367417).

21385760583 is a wasteful number, since it uses less digits than its factorization.

21385760583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90083 (or 90072 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 21385760583 in words is "twenty-one billion, three hundred eighty-five million, seven hundred sixty thousand, five hundred eighty-three".