18063972 has 60 divisors (see below), whose sum is σ = 47703040. Its totient is φ = 5960304.

The previous prime is 18063967. The next prime is 18063977. The reversal of 18063972 is 27936081.

18063972 is a `hidden beast` number, since 18 + 0 + 639 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (18063967) and next prime (18063977).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18063977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40929 + ... + 41367.

Almost surely, 2^18063972 is an apocalyptic number.

18063972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18063972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23851520).

18063972 is an abundant number, since it is smaller than the sum of its proper divisors (29639068).

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

18063972 is a wasteful number, since it uses less digits than its factorization.

18063972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 18063972 is about 4250.1731729425. The cubic root of 18063972 is about 262.3842428385.

It can be divided in two parts, 1806 and 3972, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 18063972 in words is "eighteen million, sixty-three thousand, nine hundred seventy-two".