18011942 has 16 divisors (see below), whose sum is σ = 30808512. Its totient is φ = 7824000.

The previous prime is 18011941. The next prime is 18011977. The reversal of 18011942 is 24911081.

It is a super-2 number, since 2×18011942² = 648860109222728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18011941) 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, 19934 + ... + 20817.

It is an arithmetic number, because the mean of its divisors is an integer number (1925532).

Almost surely, 2^18011942 is an apocalyptic number.

18011942 is a deficient number, since it is larger than the sum of its proper divisors (12796570).

18011942 is a wasteful number, since it uses less digits than its factorization.

18011942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40783.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18011942 is about 4244.0478319642. The cubic root of 18011942 is about 262.1320838191.

The spelling of 18011942 in words is "eighteen million, eleven thousand, nine hundred forty-two".