21637149714 has 24 divisors (see below), whose sum is σ = 46888554960. Its totient is φ = 7211142648.

The previous prime is 21637149679. The next prime is 21637149739. The reversal of 21637149714 is 41794173612.

It is a happy number.

21637149714 is a `hidden beast` number, since 2 + 1 + 637 + 1 + 4 + 9 + 7 + 1 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21637149714.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7377 + ... + 208155.

It is an arithmetic number, because the mean of its divisors is an integer number (1953689790).

Almost surely, 2^21637149714 is an apocalyptic number.

21637149714 is an abundant number, since it is smaller than the sum of its proper divisors (25251405246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21637149714 is a wasteful number, since it uses less digits than its factorization.

21637149714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206774 (or 206771 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

It can be divided in two parts, 216371 and 49714, that added together give a triangular number (266085 = T₇₂₉).

The spelling of 21637149714 in words is "twenty-one billion, six hundred thirty-seven million, one hundred forty-nine thousand, seven hundred fourteen".