18632642 has 12 divisors (see below), whose sum is σ = 32512230. Its totient is φ = 7985376.

The previous prime is 18632639. The next prime is 18632651. The reversal of 18632642 is 24623681.

It can be written as a sum of positive squares in only one way, i.e., 18412681 + 219961 = 4291^2 + 469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18632599 and 18632608.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94967 + ... + 95162.

Almost surely, 2^18632642 is an apocalyptic number.

18632642 is a deficient number, since it is larger than the sum of its proper divisors (13879588).

18632642 is a wasteful number, since it uses less digits than its factorization.

18632642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190145 (or 190138 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 18632642 is about 4316.5544129549. The cubic root of 18632642 is about 265.1092085778.

The spelling of 18632642 in words is "eighteen million, six hundred thirty-two thousand, six hundred forty-two".