20356646054464 has 112 divisors (see below), whose sum is σ = 41656777134336. Its totient is φ = 9863804620800.

The previous prime is 20356646054413. The next prime is 20356646054527. The reversal of 20356646054464 is 46445064665302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970437779 + ... + 1970448109.

It is an arithmetic number, because the mean of its divisors is an integer number (371935510128).

Almost surely, 2^{20356646054464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20356646054464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20828388567168).

20356646054464 is an abundant number, since it is smaller than the sum of its proper divisors (21300131079872).

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

20356646054464 is a wasteful number, since it uses less digits than its factorization.

20356646054464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15324 (or 15314 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 55.

The spelling of 20356646054464 in words is "twenty trillion, three hundred fifty-six billion, six hundred forty-six million, fifty-four thousand, four hundred sixty-four".