20403440122 has 8 divisors (see below), whose sum is σ = 32959403316. Its totient is φ = 9416972352.

The previous prime is 20403440107. The next prime is 20403440191. The reversal of 20403440122 is 22104430402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15151394281 + 5252045841 = 123091^2 + 72471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20403440093 and 20403440102.

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, 392373823 + ... + 392373874.

Almost surely, 2^20403440122 is an apocalyptic number.

20403440122 is a deficient number, since it is larger than the sum of its proper divisors (12555963194).

20403440122 is a wasteful number, since it uses less digits than its factorization.

20403440122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784747712.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20403440122 its reverse (22104430402), we get a palindrome (42507870524).

The spelling of 20403440122 in words is "twenty billion, four hundred three million, four hundred forty thousand, one hundred twenty-two".