18868434 has 16 divisors (see below), whose sum is σ = 40639872. Its totient is φ = 5805648.

The previous prime is 18868433. The next prime is 18868469. The reversal of 18868434 is 43486881.

It is a super-2 number, since 2×18868434² = 712035603224712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18868433) 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, 120874 + ... + 121029.

It is an arithmetic number, because the mean of its divisors is an integer number (2539992).

Almost surely, 2^18868434 is an apocalyptic number.

18868434 is an abundant number, since it is smaller than the sum of its proper divisors (21771438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18868434 is a wasteful number, since it uses less digits than its factorization.

18868434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241921.

The product of its digits is 147456, while the sum is 42.

The square root of 18868434 is about 4343.7810718313. The cubic root of 18868434 is about 266.2228238259. Note that the first 3 decimals are identical.

The spelling of 18868434 in words is "eighteen million, eight hundred sixty-eight thousand, four hundred thirty-four".