21376040651762 has 32 divisors (see below), whose sum is σ = 34966530939312. Its totient is φ = 9759713255424.

The previous prime is 21376040651753. The next prime is 21376040651863. The reversal of 21376040651762 is 26715604067312.

It can be written as a sum of positive squares in 8 ways, for example, as 19971505164601 + 1404535487161 = 4468949^2 + 1185131^2 .

It is a super-2 number, since 2×21376040651762² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21376040651762.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23624033 + ... + 24512180.

Almost surely, 2^{21376040651762} is an apocalyptic number.

21376040651762 is a deficient number, since it is larger than the sum of its proper divisors (13590490287550).

21376040651762 is a wasteful number, since it uses less digits than its factorization.

21376040651762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48136622.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 21376040651762 in words is "twenty-one trillion, three hundred seventy-six billion, forty million, six hundred fifty-one thousand, seven hundred sixty-two".