21492000396 has 18 divisors (see below), whose sum is σ = 54327001092. Its totient is φ = 7164000120.

The previous prime is 21492000367. The next prime is 21492000407. The reversal of 21492000396 is 69300029412.

21492000396 is a `hidden beast` number, since 21 + 49 + 200 + 0 + 396 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 597000011 = 21492000396 / (2 + 1 + 4 + 9 + 2 + 0 + 0 + 0 + 3 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 21492000396.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298499970 + ... + 298500041.

Almost surely, 2^21492000396 is an apocalyptic number.

It is an amenable number.

21492000396 is an abundant number, since it is smaller than the sum of its proper divisors (32835000696).

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

21492000396 is a wasteful number, since it uses less digits than its factorization.

21492000396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597000021 (or 597000016 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 21492000396 in words is "twenty-one billion, four hundred ninety-two million, three hundred ninety-six", and thus it is an aban number.