20992118 has 16 divisors (see below), whose sum is σ = 36211200. Its totient is φ = 8940456.

The previous prime is 20992063. The next prime is 20992129. The reversal of 20992118 is 81129902.

It is a happy number.

It is a super-4 number, since 4×20992118⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (2263200).

Almost surely, 2^20992118 is an apocalyptic number.

20992118 is a deficient number, since it is larger than the sum of its proper divisors (15219082).

20992118 is a wasteful number, since it uses less digits than its factorization.

20992118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 20992118 is about 4581.7156175389. The cubic root of 20992118 is about 275.8578961118.

The spelling of 20992118 in words is "twenty million, nine hundred ninety-two thousand, one hundred eighteen".