18772480154 has 4 divisors (see below), whose sum is σ = 28158720234. Its totient is φ = 9386240076.

The previous prime is 18772480117. The next prime is 18772480171. The reversal of 18772480154 is 45108427781.

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., 15950427025 + 2822053129 = 126295^2 + 53123^2 .

It is a super-2 number, since 2×18772480154² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18772480099 and 18772480108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4693120037 + ... + 4693120040.

Almost surely, 2^18772480154 is an apocalyptic number.

18772480154 is a deficient number, since it is larger than the sum of its proper divisors (9386240080).

18772480154 is an equidigital number, since it uses as much as digits as its factorization.

18772480154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9386240079.

The product of its (nonzero) digits is 501760, while the sum is 47.

The spelling of 18772480154 in words is "eighteen billion, seven hundred seventy-two million, four hundred eighty thousand, one hundred fifty-four".