20730923 has 2 divisors, whose sum is σ = 20730924. Its totient is φ = 20730922.

The previous prime is 20730917. The next prime is 20730947. The reversal of 20730923 is 32903702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20730923 - 2¹⁴ = 20714539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20730892 and 20730901.

It is not a weakly prime, because it can be changed into another prime (20730623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365461 + 10365462.

It is an arithmetic number, because the mean of its divisors is an integer number (10365462).

Almost surely, 2^20730923 is an apocalyptic number.

20730923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20730923 is an equidigital number, since it uses as much as digits as its factorization.

20730923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 20730923 is about 4553.1223352772. The cubic root of 20730923 is about 274.7089946457.

The spelling of 20730923 in words is "twenty million, seven hundred thirty thousand, nine hundred twenty-three".