18740642 has 16 divisors (see below), whose sum is σ = 28749600. Its totient is φ = 9159360.

The previous prime is 18740629. The next prime is 18740677. The reversal of 18740642 is 24604781.

It is a junction number, because it is equal to n+sod(n) for n = 18740599 and 18740608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28109 + ... + 28767.

It is an arithmetic number, because the mean of its divisors is an integer number (1796850).

Almost surely, 2^18740642 is an apocalyptic number.

18740642 is a deficient number, since it is larger than the sum of its proper divisors (10008958).

18740642 is a wasteful number, since it uses less digits than its factorization.

18740642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 18740642 is about 4329.0463152986. The cubic root of 18740642 is about 265.6204377902.

The spelling of 18740642 in words is "eighteen million, seven hundred forty thousand, six hundred forty-two".