18502149121 has 8 divisors (see below), whose sum is σ = 19632468960. Its totient is φ = 17376491328.

The previous prime is 18502149047. The next prime is 18502149157. The reversal of 18502149121 is 12194120581.

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

It is a cyclic number.

It is not a de Polignac number, because 18502149121 - 2⁷ = 18502148993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18502141121) 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, 1157331 + ... + 1173208.

It is an arithmetic number, because the mean of its divisors is an integer number (2454058620).

Almost surely, 2^18502149121 is an apocalyptic number.

It is an amenable number.

18502149121 is a deficient number, since it is larger than the sum of its proper divisors (1130319839).

18502149121 is a wasteful number, since it uses less digits than its factorization.

18502149121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331023.

The product of its (nonzero) digits is 5760, while the sum is 34.

The spelling of 18502149121 in words is "eighteen billion, five hundred two million, one hundred forty-nine thousand, one hundred twenty-one".