18740434 has 8 divisors (see below), whose sum is σ = 28144368. Its totient is φ = 9358980.

The previous prime is 18740431. The next prime is 18740437. The reversal of 18740434 is 43404781.

It is an interprime number because it is at equal distance from previous prime (18740431) and next prime (18740437).

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 = 18740396 and 18740405.

It is not an unprimeable number, because it can be changed into a prime (18740431) 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, 3352 + ... + 6979.

It is an arithmetic number, because the mean of its divisors is an integer number (3518046).

Almost surely, 2^18740434 is an apocalyptic number.

18740434 is a deficient number, since it is larger than the sum of its proper divisors (9403934).

18740434 is a wasteful number, since it uses less digits than its factorization.

18740434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 18740434 is about 4329.0222914649. The cubic root of 18740434 is about 265.6194550907.

It can be divided in two parts, 187404 and 34, that multiplied together give a palindrome (6371736).

The spelling of 18740434 in words is "eighteen million, seven hundred forty thousand, four hundred thirty-four".