21069155376 has 40 divisors (see below), whose sum is σ = 60476280560. Its totient is φ = 7023051648.

The previous prime is 21069155333. The next prime is 21069155407. The reversal of 21069155376 is 67355196012.

21069155376 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 91 + 553 + 7 + 6 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24385165 + ... + 24386028.

It is an arithmetic number, because the mean of its divisors is an integer number (1511907014).

Almost surely, 2^21069155376 is an apocalyptic number.

It is an amenable number.

21069155376 is an abundant number, since it is smaller than the sum of its proper divisors (39407125184).

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

21069155376 is a wasteful number, since it uses less digits than its factorization.

21069155376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48771210 (or 48771198 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 21069155376 in words is "twenty-one billion, sixty-nine million, one hundred fifty-five thousand, three hundred seventy-six".