20734923 has 18 divisors (see below), whose sum is σ = 30516052. Its totient is φ = 12514040.

The previous prime is 20734921. The next prime is 20734933. The reversal of 20734923 is 32943702.

It is not a de Polignac number, because 20734923 - 2¹ = 20734921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20734921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 86638 + ... + 86876.

Almost surely, 2^20734923 is an apocalyptic number.

20734923 is a deficient number, since it is larger than the sum of its proper divisors (9781129).

20734923 is an equidigital number, since it uses as much as digits as its factorization.

20734923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20734923 is about 4553.5615730986. The cubic root of 20734923 is about 274.7266617368.

It can be divided in two parts, 2073 and 4923, that added together give a palindrome (6996).

The spelling of 20734923 in words is "twenty million, seven hundred thirty-four thousand, nine hundred twenty-three".