18970380 has 216 divisors, whose sum is σ = 69132336. Its totient is φ = 4181760.

The previous prime is 18970361. The next prime is 18970411. The reversal of 18970380 is 8307981.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

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 71 ways as a sum of consecutive naturals, for example, 283107 + ... + 283173.

Almost surely, 2^18970380 is an apocalyptic number.

18970380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 4355×4356.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18970380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34566168).

18970380 is an abundant number, since it is smaller than the sum of its proper divisors (50161956).

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

18970380 is a wasteful number, since it uses less digits than its factorization.

18970380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18970380 is about 4355.4999713007. The cubic root of 18970380 is about 266.7014294959.

The spelling of 18970380 in words is "eighteen million, nine hundred seventy thousand, three hundred eighty".