20122340 has 36 divisors (see below), whose sum is σ = 49158396. Its totient is φ = 6898752.

The previous prime is 20122241. The next prime is 20122343. The reversal of 20122340 is 4322102.

It can be written as a sum of positive squares in 2 ways, for example, as 10549504 + 9572836 = 3248^2 + 3094^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (20122343) 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 in 11 ways as a sum of consecutive naturals, for example, 9287 + ... + 11246.

It is an arithmetic number, because the mean of its divisors is an integer number (1365511).

Almost surely, 2^20122340 is an apocalyptic number.

20122340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122340 is an abundant number, since it is smaller than the sum of its proper divisors (29036056).

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

20122340 is a wasteful number, since it uses less digits than its factorization.

20122340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20556 (or 20547 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20122340 is about 4485.7931294254. The cubic root of 20122340 is about 271.9941067062.

Adding to 20122340 its reverse (4322102), we get a palindrome (24444442).

The spelling of 20122340 in words is "twenty million, one hundred twenty-two thousand, three hundred forty".