18980364554 has 4 divisors (see below), whose sum is σ = 28470546834. Its totient is φ = 9490182276.

The previous prime is 18980364523. The next prime is 18980364587. The reversal of 18980364554 is 45546308981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45546308981 = 17747 ⋅2566423.

It can be written as a sum of positive squares in only one way, i.e., 15208562329 + 3771802225 = 123323^2 + 61415^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18980364496 and 18980364505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4745091137 + ... + 4745091140.

Almost surely, 2^18980364554 is an apocalyptic number.

18980364554 is a deficient number, since it is larger than the sum of its proper divisors (9490182280).

18980364554 is an equidigital number, since it uses as much as digits as its factorization.

18980364554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490182279.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 18980364554 in words is "eighteen billion, nine hundred eighty million, three hundred sixty-four thousand, five hundred fifty-four".