18220652 has 6 divisors (see below), whose sum is σ = 31886148. Its totient is φ = 9110324.

The previous prime is 18220649. The next prime is 18220667. The reversal of 18220652 is 25602281.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2277578 + ... + 2277585.

It is an arithmetic number, because the mean of its divisors is an integer number (5314358).

Almost surely, 2^18220652 is an apocalyptic number.

It is an amenable number.

18220652 is a deficient number, since it is larger than the sum of its proper divisors (13665496).

18220652 is a wasteful number, since it uses less digits than its factorization.

18220652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555167 (or 4555165 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18220652 is about 4268.5655670260. The cubic root of 18220652 is about 263.1406669901.

The spelling of 18220652 in words is "eighteen million, two hundred twenty thousand, six hundred fifty-two".