18909958069 has 8 divisors (see below), whose sum is σ = 19908738080. Its totient is φ = 17911530000.

The previous prime is 18909958061. The next prime is 18909958073. The reversal of 18909958069 is 96085990981.

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 18909958069 - 2³ = 18909958061 is a prime.

It is a super-2 number, since 2×18909958069² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18909958069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18909958061) 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, 26119 + ... + 196219.

It is an arithmetic number, because the mean of its divisors is an integer number (2488592260).

Almost surely, 2^18909958069 is an apocalyptic number.

18909958069 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18909958069 is a deficient number, since it is larger than the sum of its proper divisors (998780011).

18909958069 is a wasteful number, since it uses less digits than its factorization.

18909958069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175971.

The product of its (nonzero) digits is 12597120, while the sum is 64.

The spelling of 18909958069 in words is "eighteen billion, nine hundred nine million, nine hundred fifty-eight thousand, sixty-nine".