20458992 has 20 divisors (see below), whose sum is σ = 52852520. Its totient is φ = 6819648.

The previous prime is 20458981. The next prime is 20459027. The reversal of 20458992 is 29985402.

It is a self number, because there is not a number n which added to its sum of digits gives 20458992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213067 + ... + 213162.

It is an arithmetic number, because the mean of its divisors is an integer number (2642626).

Almost surely, 2^20458992 is an apocalyptic number.

It is an amenable number.

20458992 is an abundant number, since it is smaller than the sum of its proper divisors (32393528).

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

20458992 is a wasteful number, since it uses less digits than its factorization.

20458992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426240 (or 426234 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20458992 is about 4523.1617260496. The cubic root of 20458992 is about 273.5025695287.

The spelling of 20458992 in words is "twenty million, four hundred fifty-eight thousand, nine hundred ninety-two".