21677147187748 has 48 divisors (see below), whose sum is σ = 42181510855680. Its totient is φ = 9679670409600.

The previous prime is 21677147187739. The next prime is 21677147187791. The reversal of 21677147187748 is 84778174177612.

It is a super-2 number, since 2×21677147187748² (a number of 27 digits) contains 22 as substring.

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, 4744713 + ... + 8115823.

It is an arithmetic number, because the mean of its divisors is an integer number (878781476160).

Almost surely, 2^{21677147187748} is an apocalyptic number.

It is an amenable number.

21677147187748 is a deficient number, since it is larger than the sum of its proper divisors (20504363667932).

21677147187748 is a wasteful number, since it uses less digits than its factorization.

21677147187748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375148 (or 3375146 counting only the distinct ones).

The product of its digits is 206524416, while the sum is 70.

The spelling of 21677147187748 in words is "twenty-one trillion, six hundred seventy-seven billion, one hundred forty-seven million, one hundred eighty-seven thousand, seven hundred forty-eight".