18633507212 has 6 divisors (see below), whose sum is σ = 32608637628. Its totient is φ = 9316753604.

The previous prime is 18633507143. The next prime is 18633507227. The reversal of 18633507212 is 21270533681.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2329188398 + ... + 2329188405.

It is an arithmetic number, because the mean of its divisors is an integer number (5434772938).

Almost surely, 2^18633507212 is an apocalyptic number.

It is an amenable number.

18633507212 is a deficient number, since it is larger than the sum of its proper divisors (13975130416).

18633507212 is a wasteful number, since it uses less digits than its factorization.

18633507212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658376807 (or 4658376805 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 18633507212 in words is "eighteen billion, six hundred thirty-three million, five hundred seven thousand, two hundred twelve".