18203052 has 24 divisors (see below), whose sum is σ = 48541696. Its totient is φ = 5200848.

The previous prime is 18203041. The next prime is 18203063. The reversal of 18203052 is 25030281.

It is an interprime number because it is at equal distance from previous prime (18203041) and next prime (18203063).

It is a super-2 number, since 2×18203052² = 662702204229408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108268 + ... + 108435.

Almost surely, 2^18203052 is an apocalyptic number.

18203052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18203052 is an abundant number, since it is smaller than the sum of its proper divisors (30338644).

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

18203052 is a wasteful number, since it uses less digits than its factorization.

18203052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216717 (or 216715 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 18203052 is about 4266.5034864629. The cubic root of 18203052 is about 263.0559139360.

The spelling of 18203052 in words is "eighteen million, two hundred three thousand, fifty-two".