18139035901 has 4 divisors (see below), whose sum is σ = 20730326752. Its totient is φ = 15547745052.

The previous prime is 18139035829. The next prime is 18139035911. The reversal of 18139035901 is 10953093181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10953093181 = 821 ⋅13341161.

It is not a de Polignac number, because 18139035901 - 2²⁷ = 18004818173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18139035911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295645415 + ... + 1295645428.

It is an arithmetic number, because the mean of its divisors is an integer number (5182581688).

Almost surely, 2^18139035901 is an apocalyptic number.

It is an amenable number.

18139035901 is a deficient number, since it is larger than the sum of its proper divisors (2591290851).

18139035901 is an equidigital number, since it uses as much as digits as its factorization.

18139035901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591290850.

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 18139035901 in words is "eighteen billion, one hundred thirty-nine million, thirty-five thousand, nine hundred one".