18630043051 has 4 divisors (see below), whose sum is σ = 18643081600. Its totient is φ = 18617004504.

The previous prime is 18630043007. The next prime is 18630043067. The reversal of 18630043051 is 15034003681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18630043051 - 2⁷ = 18630042923 is a prime.

It is a super-2 number, since 2×18630043051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18630043151) 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, 6517131 + ... + 6519988.

It is an arithmetic number, because the mean of its divisors is an integer number (4660770400).

Almost surely, 2^18630043051 is an apocalyptic number.

18630043051 is a deficient number, since it is larger than the sum of its proper divisors (13038549).

18630043051 is a wasteful number, since it uses less digits than its factorization.

18630043051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13038548.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 18630043051 in words is "eighteen billion, six hundred thirty million, forty-three thousand, fifty-one".