20155013164466 has 4 divisors (see below), whose sum is σ = 30232519746702. Its totient is φ = 10077506582232.

The previous prime is 20155013164457. The next prime is 20155013164513. The reversal of 20155013164466 is 66446131055102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15236726730625 + 4918286433841 = 3903425^2 + 2217721^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038753291115 + ... + 5038753291118.

Almost surely, 2^{20155013164466} is an apocalyptic number.

20155013164466 is a deficient number, since it is larger than the sum of its proper divisors (10077506582236).

20155013164466 is a wasteful number, since it uses less digits than its factorization.

20155013164466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077506582235.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 20155013164466 in words is "twenty trillion, one hundred fifty-five billion, thirteen million, one hundred sixty-four thousand, four hundred sixty-six".