21100347524394 has 24 divisors (see below), whose sum is σ = 45723526168320. Its totient is φ = 7032509708328.

The previous prime is 21100347524387. The next prime is 21100347524411. The reversal of 21100347524394 is 49342574300112.

21100347524394 is a `hidden beast` number, since 2 + 1 + 1 + 0 + 0 + 34 + 7 + 524 + 3 + 94 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78150364 + ... + 78419895.

It is an arithmetic number, because the mean of its divisors is an integer number (1905146923680).

Almost surely, 2^{21100347524394} is an apocalyptic number.

21100347524394 is an abundant number, since it is smaller than the sum of its proper divisors (24623178643926).

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

21100347524394 is a wasteful number, since it uses less digits than its factorization.

21100347524394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156577754 (or 156577751 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 21100347524394 in words is "twenty-one trillion, one hundred billion, three hundred forty-seven million, five hundred twenty-four thousand, three hundred ninety-four".