21842715265716 has 24 divisors (see below), whose sum is σ = 51332999908960. Its totient is φ = 7228524475872.

The previous prime is 21842715265703. The next prime is 21842715265769. The reversal of 21842715265716 is 61756251724812.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6547574851 + ... + 6547578186.

Almost surely, 2^{21842715265716} is an apocalyptic number.

It is an amenable number.

21842715265716 is an abundant number, since it is smaller than the sum of its proper divisors (29490284643244).

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

21842715265716 is a wasteful number, since it uses less digits than its factorization.

21842715265716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095153183 (or 13095153181 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 57.

The spelling of 21842715265716 in words is "twenty-one trillion, eight hundred forty-two billion, seven hundred fifteen million, two hundred sixty-five thousand, seven hundred sixteen".