18842031 has 16 divisors (see below), whose sum is σ = 30061920. Its totient is φ = 11594880.

The previous prime is 18842029. The next prime is 18842071. The reversal of 18842031 is 13024881.

It is not a de Polignac number, because 18842031 - 2¹ = 18842029 is a prime.

It is a super-2 number, since 2×18842031² = 710044264409922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18841986 and 18842004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18842071) 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, 26490 + ... + 27191.

It is an arithmetic number, because the mean of its divisors is an integer number (1878870).

Almost surely, 2^18842031 is an apocalyptic number.

18842031 is a deficient number, since it is larger than the sum of its proper divisors (11219889).

18842031 is a wasteful number, since it uses less digits than its factorization.

18842031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53703 (or 53697 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18842031 is about 4340.7408353874. The cubic root of 18842031 is about 266.0985887778.

The spelling of 18842031 in words is "eighteen million, eight hundred forty-two thousand, thirty-one".