20612647131646 has 64 divisors (see below), whose sum is σ = 33740428538880. Its totient is φ = 9414575779840.

The previous prime is 20612647131631. The next prime is 20612647131653. The reversal of 20612647131646 is 64613174621602.

It is a self number, because there is not a number n which added to its sum of digits gives 20612647131646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91382415 + ... + 91607701.

It is an arithmetic number, because the mean of its divisors is an integer number (527194195920).

Almost surely, 2^{20612647131646} is an apocalyptic number.

20612647131646 is a deficient number, since it is larger than the sum of its proper divisors (13127781407234).

20612647131646 is a wasteful number, since it uses less digits than its factorization.

20612647131646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226089.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 20612647131646 in words is "twenty trillion, six hundred twelve billion, six hundred forty-seven million, one hundred thirty-one thousand, six hundred forty-six".