21201514140 has 48 divisors (see below), whose sum is σ = 60031268640. Its totient is φ = 5590210560.

The previous prime is 21201514133. The next prime is 21201514153. The reversal of 21201514140 is 4141510212.

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, 1979821 + ... + 1990500.

It is an arithmetic number, because the mean of its divisors is an integer number (1250651430).

Almost surely, 2^21201514140 is an apocalyptic number.

21201514140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201514140 is an abundant number, since it is smaller than the sum of its proper divisors (38829754500).

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

21201514140 is a wasteful number, since it uses less digits than its factorization.

21201514140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970422 (or 3970420 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The spelling of 21201514140 in words is "twenty-one billion, two hundred one million, five hundred fourteen thousand, one hundred forty".