21935760939 has 12 divisors (see below), whose sum is σ = 32157899176. Its totient is φ = 14405573952.

The previous prime is 21935760883. The next prime is 21935760941. The reversal of 21935760939 is 93906753912.

It is a happy number.

21935760939 is a `hidden beast` number, since 21 + 9 + 3 + 5 + 7 + 609 + 3 + 9 = 666.

It is not a de Polignac number, because 21935760939 - 2⁷ = 21935760811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21935760949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18188254 + ... + 18189459.

Almost surely, 2^21935760939 is an apocalyptic number.

21935760939 is a deficient number, since it is larger than the sum of its proper divisors (10222138237).

21935760939 is a wasteful number, since it uses less digits than its factorization.

21935760939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36377786 (or 36377783 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 21935760939 in words is "twenty-one billion, nine hundred thirty-five million, seven hundred sixty thousand, nine hundred thirty-nine".