20122323140 has 12 divisors (see below), whose sum is σ = 42256878636. Its totient is φ = 8048929248.

The previous prime is 20122323113. The next prime is 20122323161. The reversal of 20122323140 is 4132322102.

It can be written as a sum of positive squares in 2 ways, for example, as 4893282304 + 15229040836 = 69952^2 + 123406^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1006116157 = 20122323140 / (2 + 0 + 1 + 2 + 2 + 3 + 2 + 3 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503058059 + ... + 503058098.

It is an arithmetic number, because the mean of its divisors is an integer number (3521406553).

Almost surely, 2^20122323140 is an apocalyptic number.

20122323140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122323140 is an abundant number, since it is smaller than the sum of its proper divisors (22134555496).

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

20122323140 is a wasteful number, since it uses less digits than its factorization.

20122323140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006116166 (or 1006116164 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20122323140 its reverse (4132322102), we get a palindrome (24254645242).

The spelling of 20122323140 in words is "twenty billion, one hundred twenty-two million, three hundred twenty-three thousand, one hundred forty".