18880938 has 20 divisors (see below), whose sum is σ = 42307650. Its totient is φ = 6293592.

The previous prime is 18880937. The next prime is 18880949. The reversal of 18880938 is 83908881.

It can be written as a sum of positive squares in only one way, i.e., 16621929 + 2259009 = 4077^2 + 1503^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18880893 and 18880902.

It is not an unprimeable number, because it can be changed into a prime (18880937) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 58113 + ... + 58436.

Almost surely, 2^18880938 is an apocalyptic number.

18880938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18880938 is an abundant number, since it is smaller than the sum of its proper divisors (23426712).

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

18880938 is a wasteful number, since it uses less digits than its factorization.

18880938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116563 (or 116554 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 18880938 is about 4345.2201325134. The cubic root of 18880938 is about 266.2816189388.

The spelling of 18880938 in words is "eighteen million, eight hundred eighty thousand, nine hundred thirty-eight".