21140306232 has 64 divisors (see below), whose sum is σ = 53892034560. Its totient is φ = 6909033600.

The previous prime is 21140306219. The next prime is 21140306251. The reversal of 21140306232 is 23260304112.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 274153 + ... + 342695.

It is an arithmetic number, because the mean of its divisors is an integer number (842063040).

Almost surely, 2^21140306232 is an apocalyptic number.

It is an amenable number.

21140306232 is an abundant number, since it is smaller than the sum of its proper divisors (32751728328).

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

21140306232 is a wasteful number, since it uses less digits than its factorization.

21140306232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68804 (or 68800 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 21140306232 in words is "twenty-one billion, one hundred forty million, three hundred six thousand, two hundred thirty-two".