18900215069 has 16 divisors (see below), whose sum is σ = 20242353600. Its totient is φ = 17584815360.

The previous prime is 18900215041. The next prime is 18900215071. The reversal of 18900215069 is 96051200981.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18900215069 is a prime.

It is a super-2 number, since 2×18900215069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900215039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516782 + ... + 552144.

It is an arithmetic number, because the mean of its divisors is an integer number (1265147100).

Almost surely, 2^18900215069 is an apocalyptic number.

It is an amenable number.

18900215069 is a deficient number, since it is larger than the sum of its proper divisors (1342138531).

18900215069 is a wasteful number, since it uses less digits than its factorization.

18900215069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35740.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 18900215069 in words is "eighteen billion, nine hundred million, two hundred fifteen thousand, sixty-nine".