18406822 has 16 divisors (see below), whose sum is σ = 32643360. Its totient is φ = 7616448.

The previous prime is 18406807. The next prime is 18406823. The reversal of 18406822 is 22860481.

It is a super-2 number, since 2×18406822² = 677622192279368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18406823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22263 + ... + 23074.

It is an arithmetic number, because the mean of its divisors is an integer number (2040210).

Almost surely, 2^18406822 is an apocalyptic number.

18406822 is a deficient number, since it is larger than the sum of its proper divisors (14236538).

18406822 is a wasteful number, since it uses less digits than its factorization.

18406822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45375.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18406822 is about 4290.3172376877. The cubic root of 18406822 is about 264.0338474356.

The spelling of 18406822 in words is "eighteen million, four hundred six thousand, eight hundred twenty-two".