20657466444556 has 12 divisors (see below), whose sum is σ = 36150800605920. Its totient is φ = 10328666271440.

The previous prime is 20657466444547. The next prime is 20657466444569. The reversal of 20657466444556 is 65544466475602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16040251 + ... + 17280178.

It is an arithmetic number, because the mean of its divisors is an integer number (3012566717160).

Almost surely, 2^{20657466444556} is an apocalyptic number.

It is an amenable number.

20657466444556 is a deficient number, since it is larger than the sum of its proper divisors (15493334161364).

20657466444556 is a wasteful number, since it uses less digits than its factorization.

20657466444556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33475424 (or 33475422 counting only the distinct ones).

The product of its (nonzero) digits is 580608000, while the sum is 64.

The spelling of 20657466444556 in words is "twenty trillion, six hundred fifty-seven billion, four hundred sixty-six million, four hundred forty-four thousand, five hundred fifty-six".