18363954939 has 16 divisors (see below), whose sum is σ = 26714845440. Its totient is φ = 11128153760.

The previous prime is 18363954937. The next prime is 18363954949. The reversal of 18363954939 is 93945936381.

It is a cyclic number.

It is not a de Polignac number, because 18363954939 - 2¹ = 18363954937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18363954937) 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, 238042 + ... + 305600.

It is an arithmetic number, because the mean of its divisors is an integer number (1669677840).

Almost surely, 2^18363954939 is an apocalyptic number.

18363954939 is a deficient number, since it is larger than the sum of its proper divisors (8350890501).

18363954939 is a wasteful number, since it uses less digits than its factorization.

18363954939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75810.

The product of its digits is 18895680, while the sum is 60.

The spelling of 18363954939 in words is "eighteen billion, three hundred sixty-three million, nine hundred fifty-four thousand, nine hundred thirty-nine".