21367687132 has 12 divisors (see below), whose sum is σ = 40792857336. Its totient is φ = 9712585040.

The previous prime is 21367687129. The next prime is 21367687153. The reversal of 21367687132 is 23178676312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242814583 + ... + 242814670.

It is an arithmetic number, because the mean of its divisors is an integer number (3399404778).

Almost surely, 2^21367687132 is an apocalyptic number.

21367687132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21367687132 is a deficient number, since it is larger than the sum of its proper divisors (19425170204).

21367687132 is a wasteful number, since it uses less digits than its factorization.

21367687132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485629268 (or 485629266 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The spelling of 21367687132 in words is "twenty-one billion, three hundred sixty-seven million, six hundred eighty-seven thousand, one hundred thirty-two".