21837942396 has 36 divisors (see below), whose sum is σ = 55478878000. Its totient is φ = 7242732288.

The previous prime is 21837942377. The next prime is 21837942409. The reversal of 21837942396 is 69324973812.

21837942396 is a `hidden beast` number, since 2 + 183 + 79 + 4 + 2 + 396 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1516981 + ... + 1531308.

Almost surely, 2^21837942396 is an apocalyptic number.

It is an amenable number.

21837942396 is an abundant number, since it is smaller than the sum of its proper divisors (33640935604).

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

21837942396 is a wasteful number, since it uses less digits than its factorization.

21837942396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048498 (or 3048493 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 21837942396 in words is "twenty-one billion, eight hundred thirty-seven million, nine hundred forty-two thousand, three hundred ninety-six".