18930747 has 16 divisors (see below), whose sum is σ = 27758592. Its totient is φ = 11380320.

The previous prime is 18930731. The next prime is 18930749. The reversal of 18930747 is 74703981.

It is not a de Polignac number, because 18930747 - 2⁴ = 18930731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18930749) 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, 1933 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (1734912).

Almost surely, 2^18930747 is an apocalyptic number.

18930747 is a deficient number, since it is larger than the sum of its proper divisors (8827845).

18930747 is a wasteful number, since it uses less digits than its factorization.

18930747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 18930747 is about 4350.9478277727. The cubic root of 18930747 is about 266.5155687418.

The spelling of 18930747 in words is "eighteen million, nine hundred thirty thousand, seven hundred forty-seven".