21164260374 has 48 divisors (see below), whose sum is σ = 46258102800. Its totient is φ = 6993036288.

The previous prime is 21164260373. The next prime is 21164260409. The reversal of 21164260374 is 47306246112.

21164260374 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 42 + 603 + 7 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164260373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1677562 + ... + 1690130.

It is an arithmetic number, because the mean of its divisors is an integer number (963710475).

Almost surely, 2^21164260374 is an apocalyptic number.

21164260374 is an abundant number, since it is smaller than the sum of its proper divisors (25093842426).

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

21164260374 is a wasteful number, since it uses less digits than its factorization.

21164260374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13389 (or 13386 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21164260374 in words is "twenty-one billion, one hundred sixty-four million, two hundred sixty thousand, three hundred seventy-four".