21062715015612 has 48 divisors (see below), whose sum is σ = 49957133566592. Its totient is φ = 6905100242880.

The previous prime is 21062715015611. The next prime is 21062715015697. The reversal of 21062715015612 is 21651051726012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062715015611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5694063 + ... + 8634105.

Almost surely, 2^{21062715015612} is an apocalyptic number.

It is an amenable number.

21062715015612 is an abundant number, since it is smaller than the sum of its proper divisors (28894418550980).

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

21062715015612 is a wasteful number, since it uses less digits than its factorization.

21062715015612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949898 (or 2949896 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 21062715015612 in words is "twenty-one trillion, sixty-two billion, seven hundred fifteen million, fifteen thousand, six hundred twelve".