20343665972608 has 96 divisors (see below), whose sum is σ = 45495568147680. Its totient is φ = 9050373319680.

The previous prime is 20343665972459. The next prime is 20343665972621. The reversal of 20343665972608 is 80627956634302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13245591 + ... + 14701462.

It is an arithmetic number, because the mean of its divisors is an integer number (473912168205).

Almost surely, 2^{20343665972608} is an apocalyptic number.

It is an amenable number.

20343665972608 is an abundant number, since it is smaller than the sum of its proper divisors (25151902175072).

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

20343665972608 is a wasteful number, since it uses less digits than its factorization.

20343665972608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947136 (or 27947113 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 61.

The spelling of 20343665972608 in words is "twenty trillion, three hundred forty-three billion, six hundred sixty-five million, nine hundred seventy-two thousand, six hundred eight".