18884940 has 48 divisors (see below), whose sum is σ = 53071200. Its totient is φ = 5017600.

The previous prime is 18884939. The next prime is 18884941. The reversal of 18884940 is 4948881.

It is an interprime number because it is at equal distance from previous prime (18884939) and next prime (18884941).

It is a junction number, because it is equal to n+sod(n) for n = 18884892 and 18884901.

It is not an unprimeable number, because it can be changed into a prime (18884941) 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, 26590 + ... + 27290.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 2^18884940 is an apocalyptic number.

18884940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18884940 is an abundant number, since it is smaller than the sum of its proper divisors (34186260).

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

18884940 is a wasteful number, since it uses less digits than its factorization.

18884940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18884940 is about 4345.6806141271. The cubic root of 18884940 is about 266.3004312767.

The spelling of 18884940 in words is "eighteen million, eight hundred eighty-four thousand, nine hundred forty".