18738738554 has 16 divisors (see below), whose sum is σ = 28304121600. Its totient is φ = 9304064400.

The previous prime is 18738738553. The next prime is 18738738569. The reversal of 18738738554 is 45583783781.

It is a super-2 number, since 2×18738738554² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18738738493 and 18738738502.

It is not an unprimeable number, because it can be changed into a prime (18738738553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1827887 + ... + 1838109.

It is an arithmetic number, because the mean of its divisors is an integer number (1769007600).

Almost surely, 2^18738738554 is an apocalyptic number.

18738738554 is a deficient number, since it is larger than the sum of its proper divisors (9565383046).

18738738554 is a wasteful number, since it uses less digits than its factorization.

18738738554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16525.

The product of its digits is 22579200, while the sum is 59.

The spelling of 18738738554 in words is "eighteen billion, seven hundred thirty-eight million, seven hundred thirty-eight thousand, five hundred fifty-four".