18220910 has 8 divisors (see below), whose sum is σ = 32797656. Its totient is φ = 7288360.

The previous prime is 18220897. The next prime is 18220919. The reversal of 18220910 is 1902281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18220910² = 664003122456200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18220919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911036 + ... + 911055.

It is an arithmetic number, because the mean of its divisors is an integer number (4099707).

Almost surely, 2^18220910 is an apocalyptic number.

18220910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18220910 is a deficient number, since it is larger than the sum of its proper divisors (14576746).

18220910 is a wasteful number, since it uses less digits than its factorization.

18220910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822098.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 18220910 is about 4268.5957878441. The cubic root of 18220910 is about 263.1419089868.

The spelling of 18220910 in words is "eighteen million, two hundred twenty thousand, nine hundred ten".