18940272307 has 16 divisors (see below), whose sum is σ = 21149694720. Its totient is φ = 16812381600.

The previous prime is 18940272293. The next prime is 18940272319. The reversal of 18940272307 is 70327204981.

It is a cyclic number.

It is not a de Polignac number, because 18940272307 - 2⁷ = 18940272179 is a prime.

It is a super-2 number, since 2×18940272307² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (18940272347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2133057 + ... + 2141917.

It is an arithmetic number, because the mean of its divisors is an integer number (1321855920).

Almost surely, 2^18940272307 is an apocalyptic number.

18940272307 is a deficient number, since it is larger than the sum of its proper divisors (2209422413).

18940272307 is a wasteful number, since it uses less digits than its factorization.

18940272307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 18940272307 in words is "eighteen billion, nine hundred forty million, two hundred seventy-two thousand, three hundred seven".