18520035738 has 16 divisors (see below), whose sum is σ = 38317315680. Its totient is φ = 5960471216.

The previous prime is 18520035707. The next prime is 18520035769. The reversal of 18520035738 is 83753002581.

It is an interprime number because it is at equal distance from previous prime (18520035707) and next prime (18520035769).

It is a self number, because there is not a number n which added to its sum of digits gives 18520035738.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 53218320 + ... + 53218667.

It is an arithmetic number, because the mean of its divisors is an integer number (2394832230).

Almost surely, 2^18520035738 is an apocalyptic number.

18520035738 is an abundant number, since it is smaller than the sum of its proper divisors (19797279942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18520035738 is a wasteful number, since it uses less digits than its factorization.

18520035738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106437021.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 18520035738 in words is "eighteen billion, five hundred twenty million, thirty-five thousand, seven hundred thirty-eight".