20422344 has 32 divisors (see below), whose sum is σ = 53277120. Its totient is φ = 6511296.

The previous prime is 20422343. The next prime is 20422357. The reversal of 20422344 is 44322402.

It is a self number, because there is not a number n which added to its sum of digits gives 20422344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17947 + ... + 19050.

It is an arithmetic number, because the mean of its divisors is an integer number (1664910).

Almost surely, 2^20422344 is an apocalyptic number.

20422344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20422344 is an abundant number, since it is smaller than the sum of its proper divisors (32854776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422344 is a wasteful number, since it uses less digits than its factorization.

20422344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37029 (or 37025 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20422344 is about 4519.1087616918. The cubic root of 20422344 is about 273.3391643941.

Adding to 20422344 its reverse (44322402), we get a palindrome (64744746).

The spelling of 20422344 in words is "twenty million, four hundred twenty-two thousand, three hundred forty-four".