18220002 has 32 divisors (see below), whose sum is σ = 39260160. Its totient is φ = 5620560.

The previous prime is 18219989. The next prime is 18220049. The reversal of 18220002 is 20002281.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149 + ... + 6407.

It is an arithmetic number, because the mean of its divisors is an integer number (1226880).

Almost surely, 2^18220002 is an apocalyptic number.

18220002 is an abundant number, since it is smaller than the sum of its proper divisors (21040158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18220002 is a wasteful number, since it uses less digits than its factorization.

18220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 18220002 is about 4268.4894283575. The cubic root of 18220002 is about 263.1375378765.

Adding to 18220002 its reverse (20002281), we get a palindrome (38222283).

The spelling of 18220002 in words is "eighteen million, two hundred twenty thousand, two".