21110525140 has 48 divisors (see below), whose sum is σ = 45143771904. Its totient is φ = 8290598400.

The previous prime is 21110525077. The next prime is 21110525153. The reversal of 21110525140 is 4152501112.

It is a congruent number.

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, 311377 + ... + 373063.

It is an arithmetic number, because the mean of its divisors is an integer number (940495248).

Almost surely, 2^21110525140 is an apocalyptic number.

21110525140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110525140 is an abundant number, since it is smaller than the sum of its proper divisors (24033246764).

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

21110525140 is a wasteful number, since it uses less digits than its factorization.

21110525140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62008 (or 62006 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The spelling of 21110525140 in words is "twenty-one billion, one hundred ten million, five hundred twenty-five thousand, one hundred forty".