20422669 has 2 divisors, whose sum is σ = 20422670. Its totient is φ = 20422668.

The previous prime is 20422657. The next prime is 20422691. The reversal of 20422669 is 96622402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 6953769 = 3670^2 + 2637^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422669 - 2⁵ = 20422637 is a prime.

It is a super-2 number, since 2×20422669² = 834170818167122, which contains 22 as substring.

It is equal to p_1295671 and since 20422669 and 1295671 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20422669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20422609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211334 + 10211335.

It is an arithmetic number, because the mean of its divisors is an integer number (10211335).

Almost surely, 2^20422669 is an apocalyptic number.

It is an amenable number.

20422669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422669 is an equidigital number, since it uses as much as digits as its factorization.

20422669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20422669 is about 4519.1447199664. The cubic root of 20422669 is about 273.3406143543.

The spelling of 20422669 in words is "twenty million, four hundred twenty-two thousand, six hundred sixty-nine".