18870554974 has 4 divisors (see below), whose sum is σ = 28305832464. Its totient is φ = 9435277486.

The previous prime is 18870554933. The next prime is 18870554977. The reversal of 18870554974 is 47945507881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47945507881 = 17 ⋅2820323993.

It is a super-2 number, since 2×18870554974² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870554977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4717638742 + ... + 4717638745.

It is an arithmetic number, because the mean of its divisors is an integer number (7076458116).

Almost surely, 2^18870554974 is an apocalyptic number.

18870554974 is a deficient number, since it is larger than the sum of its proper divisors (9435277490).

18870554974 is an equidigital number, since it uses as much as digits as its factorization.

18870554974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9435277489.

The product of its (nonzero) digits is 11289600, while the sum is 58.

The spelling of 18870554974 in words is "eighteen billion, eight hundred seventy million, five hundred fifty-four thousand, nine hundred seventy-four".