20924423 has 4 divisors (see below), whose sum is σ = 22534008. Its totient is φ = 19314840.

The previous prime is 20924419. The next prime is 20924429. The reversal of 20924423 is 32442902.

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 20924423 - 2² = 20924419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20924392 and 20924401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20924429) 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, 804773 + ... + 804798.

It is an arithmetic number, because the mean of its divisors is an integer number (5633502).

Almost surely, 2^20924423 is an apocalyptic number.

20924423 is a deficient number, since it is larger than the sum of its proper divisors (1609585).

20924423 is a wasteful number, since it uses less digits than its factorization.

20924423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609584.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20924423 is about 4574.3221355738. The cubic root of 20924423 is about 275.5610496204.

The spelling of 20924423 in words is "twenty million, nine hundred twenty-four thousand, four hundred twenty-three".