20822407 has 2 divisors, whose sum is σ = 20822408. Its totient is φ = 20822406.

The previous prime is 20822393. The next prime is 20822419. The reversal of 20822407 is 70422802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20822407 - 2⁷ = 20822279 is a prime.

It is equal to p_1319425 and since 20822407 and 1319425 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20822437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411203 + 10411204.

It is an arithmetic number, because the mean of its divisors is an integer number (10411204).

Almost surely, 2^20822407 is an apocalyptic number.

20822407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20822407 is an equidigital number, since it uses as much as digits as its factorization.

20822407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20822407 is about 4563.1575690524. The cubic root of 20822407 is about 275.1124917188.

It can be divided in two parts, 2082 and 2407, that added together give a square (4489 = 67²).

The spelling of 20822407 in words is "twenty million, eight hundred twenty-two thousand, four hundred seven".