18223038 has 24 divisors (see below), whose sum is σ = 41200848. Its totient is φ = 5810112.

The previous prime is 18223019. The next prime is 18223057. The reversal of 18223038 is 83032281.

It is an interprime number because it is at equal distance from previous prime (18223019) and next prime (18223057).

It is a super-2 number, since 2×18223038² = 664158227898888, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21595 + ... + 22422.

It is an arithmetic number, because the mean of its divisors is an integer number (1716702).

Almost surely, 2^18223038 is an apocalyptic number.

18223038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18223038 is an abundant number, since it is smaller than the sum of its proper divisors (22977810).

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

18223038 is a wasteful number, since it uses less digits than its factorization.

18223038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44048 (or 44045 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18223038 is about 4268.8450428658. The cubic root of 18223038 is about 263.1521526059.

It can be divided in two parts, 182 and 23038, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 18223038 in words is "eighteen million, two hundred twenty-three thousand, thirty-eight".