20440120431 has 8 divisors (see below), whose sum is σ = 28193269680. Its totient is φ = 13156859072.

The previous prime is 20440120429. The next prime is 20440120501. The reversal of 20440120431 is 13402104402.

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

It is a cyclic number.

It is not a de Polignac number, because 20440120431 - 2¹ = 20440120429 is a prime.

It is a super-2 number, since 2×20440120431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20440120398 and 20440120407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117471870 + ... + 117472043.

It is an arithmetic number, because the mean of its divisors is an integer number (3524158710).

Almost surely, 2^20440120431 is an apocalyptic number.

20440120431 is a deficient number, since it is larger than the sum of its proper divisors (7753149249).

20440120431 is a wasteful number, since it uses less digits than its factorization.

20440120431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234943945.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20440120431 its reverse (13402104402), we get a palindrome (33842224833).

The spelling of 20440120431 in words is "twenty billion, four hundred forty million, one hundred twenty thousand, four hundred thirty-one".