21543426000 has 120 divisors (see below), whose sum is σ = 75244068744. Its totient is φ = 5744908800.

The previous prime is 21543425999. The next prime is 21543426019. The reversal of 21543426000 is 62434512.

21543426000 is a `hidden beast` number, since 2 + 1 + 54 + 3 + 4 + 2 + 600 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1868314176 + 19675111824 = 43224^2 + 140268^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 580429 + ... + 616428.

Almost surely, 2^21543426000 is an apocalyptic number.

21543426000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21543426000 is an abundant number, since it is smaller than the sum of its proper divisors (53700642744).

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

21543426000 is a wasteful number, since it uses less digits than its factorization.

21543426000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196886 (or 1196867 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 21543426000 in words is "twenty-one billion, five hundred forty-three million, four hundred twenty-six thousand".