111918023 has 16 divisors (see below), whose sum is σ = 133885440. Its totient is φ = 91471776.

The previous prime is 111918019. The next prime is 111918031. The reversal of 111918023 is 320819111.

It is a cyclic number.

It is not a de Polignac number, because 111918023 - 2² = 111918019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111917983 and 111918001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111918823) 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, 61736 + ... + 63522.

It is an arithmetic number, because the mean of its divisors is an integer number (8367840).

Almost surely, 2^111918023 is an apocalyptic number.

111918023 is a deficient number, since it is larger than the sum of its proper divisors (21967417).

111918023 is a wasteful number, since it uses less digits than its factorization.

111918023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 111918023 is about 10579.1314860909. The cubic root of 111918023 is about 481.9108192300.

The spelling of 111918023 in words is "one hundred eleven million, nine hundred eighteen thousand, twenty-three".