21544046010 has 32 divisors (see below), whose sum is σ = 57450790080. Its totient is φ = 5745078864.

The previous prime is 21544046009. The next prime is 21544046047. The reversal of 21544046010 is 1064044512.

21544046010 is a `hidden beast` number, since 2 + 1 + 54 + 4 + 0 + 4 + 601 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39896112 + ... + 39896651.

It is an arithmetic number, because the mean of its divisors is an integer number (1795337190).

Almost surely, 2^21544046010 is an apocalyptic number.

21544046010 is an abundant number, since it is smaller than the sum of its proper divisors (35906744070).

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

21544046010 is a wasteful number, since it uses less digits than its factorization.

21544046010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79792779 (or 79792773 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 21544046010 in words is "twenty-one billion, five hundred forty-four million, forty-six thousand, ten".