18211675051 has 8 divisors (see below), whose sum is σ = 19288414224. Its totient is φ = 17135543040.

The previous prime is 18211675049. The next prime is 18211675067. The reversal of 18211675051 is 15057611281.

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

It is not a de Polignac number, because 18211675051 - 2¹ = 18211675049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18211675051.

It is not an unprimeable number, because it can be changed into a prime (18211675091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89290 + ... + 210703.

It is an arithmetic number, because the mean of its divisors is an integer number (2411051778).

Almost surely, 2^18211675051 is an apocalyptic number.

18211675051 is a deficient number, since it is larger than the sum of its proper divisors (1076739173).

18211675051 is a wasteful number, since it uses less digits than its factorization.

18211675051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303581.

The product of its (nonzero) digits is 16800, while the sum is 37.

The spelling of 18211675051 in words is "eighteen billion, two hundred eleven million, six hundred seventy-five thousand, fifty-one".