18948730 has 8 divisors (see below), whose sum is σ = 34107732. Its totient is φ = 7579488.

The previous prime is 18948697. The next prime is 18948733. The reversal of 18948730 is 3784981.

It can be written as a sum of positive squares in 2 ways, for example, as 18948609 + 121 = 4353^2 + 11^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18948730² = 718108737225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18948733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947427 + ... + 947446.

Almost surely, 2^18948730 is an apocalyptic number.

18948730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18948730 is a deficient number, since it is larger than the sum of its proper divisors (15159002).

18948730 is a wasteful number, since it uses less digits than its factorization.

18948730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894880.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18948730 is about 4353.0138984386. The cubic root of 18948730 is about 266.5999329540.

The spelling of 18948730 in words is "eighteen million, nine hundred forty-eight thousand, seven hundred thirty".