20792123 has 4 divisors (see below), whose sum is σ = 22682328. Its totient is φ = 18901920.

The previous prime is 20792119. The next prime is 20792143. The reversal of 20792123 is 32129702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20792123 - 2² = 20792119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20792092 and 20792101.

It is not an unprimeable number, because it can be changed into a prime (20792143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945086 + ... + 945107.

It is an arithmetic number, because the mean of its divisors is an integer number (5670582).

Almost surely, 2^20792123 is an apocalyptic number.

20792123 is a deficient number, since it is larger than the sum of its proper divisors (1890205).

20792123 is a wasteful number, since it uses less digits than its factorization.

20792123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890204.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20792123 is about 4559.8380453696. The cubic root of 20792123 is about 274.9790529499.

The spelling of 20792123 in words is "twenty million, seven hundred ninety-two thousand, one hundred twenty-three".