21461759937 has 12 divisors (see below), whose sum is σ = 31525749840. Its totient is φ = 14065333848.

The previous prime is 21461759933. The next prime is 21461759953. The reversal of 21461759937 is 73995716412.

21461759937 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 17 + 599 + 37 = 666.

It is not a de Polignac number, because 21461759937 - 2² = 21461759933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21461759933) 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, 20208283 + ... + 20209344.

It is an arithmetic number, because the mean of its divisors is an integer number (2627145820).

Almost surely, 2^21461759937 is an apocalyptic number.

It is an amenable number.

21461759937 is a deficient number, since it is larger than the sum of its proper divisors (10063989903).

21461759937 is a wasteful number, since it uses less digits than its factorization.

21461759937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40417692 (or 40417689 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The spelling of 21461759937 in words is "twenty-one billion, four hundred sixty-one million, seven hundred fifty-nine thousand, nine hundred thirty-seven".