18863434 has 8 divisors (see below), whose sum is σ = 28442340. Its totient is φ = 9382656.

The previous prime is 18863413. The next prime is 18863443. The reversal of 18863434 is 43436881.

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 1432809 = 4175^2 + 1197^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18863393 and 18863402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24049 + ... + 24820.

Almost surely, 2^18863434 is an apocalyptic number.

18863434 is a deficient number, since it is larger than the sum of its proper divisors (9578906).

18863434 is a wasteful number, since it uses less digits than its factorization.

18863434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49064.

The product of its digits is 55296, while the sum is 37.

The square root of 18863434 is about 4343.2054982467. The cubic root of 18863434 is about 266.1993060339.

The spelling of 18863434 in words is "eighteen million, eight hundred sixty-three thousand, four hundred thirty-four".