18662942 has 4 divisors (see below), whose sum is σ = 27994416. Its totient is φ = 9331470.

The previous prime is 18662933. The next prime is 18662947. The reversal of 18662942 is 24926681.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18662896 and 18662905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18662947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4665734 + ... + 4665737.

It is an arithmetic number, because the mean of its divisors is an integer number (6998604).

Almost surely, 2^18662942 is an apocalyptic number.

18662942 is a deficient number, since it is larger than the sum of its proper divisors (9331474).

18662942 is an equidigital number, since it uses as much as digits as its factorization.

18662942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331473.

The product of its digits is 41472, while the sum is 38.

The square root of 18662942 is about 4320.0627310260. The cubic root of 18662942 is about 265.2528357078.

The spelling of 18662942 in words is "eighteen million, six hundred sixty-two thousand, nine hundred forty-two".