20798923 has 12 divisors (see below), whose sum is σ = 22449744. Its totient is φ = 19232400.

The previous prime is 20798881. The next prime is 20798927. The reversal of 20798923 is 32989702.

It is not a de Polignac number, because 20798923 - 2⁹ = 20798411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21633 + ... + 22573.

It is an arithmetic number, because the mean of its divisors is an integer number (1870812).

Almost surely, 2^20798923 is an apocalyptic number.

20798923 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20798923 is a deficient number, since it is larger than the sum of its proper divisors (1650821).

20798923 is an equidigital number, since it uses as much as digits as its factorization.

20798923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20798923 is about 4560.5836249322. The cubic root of 20798923 is about 275.0090267009.

The spelling of 20798923 in words is "twenty million, seven hundred ninety-eight thousand, nine hundred twenty-three".