18748242051 has 16 divisors (see below), whose sum is σ = 31165909248. Its totient is φ = 9739346400.

The previous prime is 18748242043. The next prime is 18748242127. The reversal of 18748242051 is 15024284781.

It is not a de Polignac number, because 18748242051 - 2³ = 18748242043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18748241994 and 18748242012.

It is not an unprimeable number, because it can be changed into a prime (18748242551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40580380 + ... + 40580841.

It is an arithmetic number, because the mean of its divisors is an integer number (1947869328).

Almost surely, 2^18748242051 is an apocalyptic number.

18748242051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18748242051 is a deficient number, since it is larger than the sum of its proper divisors (12417667197).

18748242051 is a wasteful number, since it uses less digits than its factorization.

18748242051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81161242.

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 18748242051 in words is "eighteen billion, seven hundred forty-eight million, two hundred forty-two thousand, fifty-one".