20415533604456 has 16 divisors (see below), whose sum is σ = 51038834011200. Its totient is φ = 6805177868144.

The previous prime is 20415533604391. The next prime is 20415533604503. The reversal of 20415533604456 is 65440633551402.

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, 425323616736 + ... + 425323616783.

It is an arithmetic number, because the mean of its divisors is an integer number (3189927125700).

Almost surely, 2^{20415533604456} is an apocalyptic number.

It is an amenable number.

20415533604456 is an abundant number, since it is smaller than the sum of its proper divisors (30623300406744).

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

20415533604456 is a wasteful number, since it uses less digits than its factorization.

20415533604456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850647233528 (or 850647233524 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 20415533604456 in words is "twenty trillion, four hundred fifteen billion, five hundred thirty-three million, six hundred four thousand, four hundred fifty-six".