20922479 has 6 divisors (see below), whose sum is σ = 21872256. Its totient is φ = 20012300.

The previous prime is 20922463. The next prime is 20922487. The reversal of 20922479 is 97422902.

It is a happy number.

It is not a de Polignac number, because 20922479 - 2⁴ = 20922463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20922679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19247 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (3645376).

Almost surely, 2^20922479 is an apocalyptic number.

20922479 is a deficient number, since it is larger than the sum of its proper divisors (949777).

20922479 is an equidigital number, since it uses as much as digits as its factorization.

20922479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39597 (or 39574 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20922479 is about 4574.1096401376. The cubic root of 20922479 is about 275.5525156174.

The spelling of 20922479 in words is "twenty million, nine hundred twenty-two thousand, four hundred seventy-nine".