20180992 has 52 divisors (see below), whose sum is σ = 43576120. Its totient is φ = 9289728.

The previous prime is 20180987. The next prime is 20181019. The reversal of 20180992 is 29908102.

It is a tau number, because it is divible by the number of its divisors (52).

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, 53059 + ... + 53437.

Almost surely, 2^20180992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20180992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21788060).

20180992 is an abundant number, since it is smaller than the sum of its proper divisors (23395128).

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

20180992 is an equidigital number, since it uses as much as digits as its factorization.

20180992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20180992 is about 4492.3259009115. The cubic root of 20180992 is about 272.2581171480.

The spelling of 20180992 in words is "twenty million, one hundred eighty thousand, nine hundred ninety-two".