18700051 has 8 divisors (see below), whose sum is σ = 20080224. Its totient is φ = 17351040.

The previous prime is 18700039. The next prime is 18700061. The reversal of 18700051 is 15000781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18699995 and 18700031.

It is not an unprimeable number, because it can be changed into a prime (18700001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6540 + ... + 8953.

It is an arithmetic number, because the mean of its divisors is an integer number (2510028).

Almost surely, 2^18700051 is an apocalyptic number.

18700051 is a deficient number, since it is larger than the sum of its proper divisors (1380173).

18700051 is a wasteful number, since it uses less digits than its factorization.

18700051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15581.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 18700051 is about 4324.3555589244. The cubic root of 18700051 is about 265.4285270258.

The spelling of 18700051 in words is "eighteen million, seven hundred thousand, fifty-one".