20440131222 has 32 divisors (see below), whose sum is σ = 46726912512. Its totient is φ = 5839210944.

The previous prime is 20440131197. The next prime is 20440131247. The reversal of 20440131222 is 22213104402.

It is an interprime number because it is at equal distance from previous prime (20440131197) and next prime (20440131247).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305263 + ... + 366149.

It is an arithmetic number, because the mean of its divisors is an integer number (1460216016).

Almost surely, 2^20440131222 is an apocalyptic number.

20440131222 is an abundant number, since it is smaller than the sum of its proper divisors (26286781290).

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

20440131222 is a wasteful number, since it uses less digits than its factorization.

20440131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68892.

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

Adding to 20440131222 its reverse (22213104402), we get a palindrome (42653235624).

The spelling of 20440131222 in words is "twenty billion, four hundred forty million, one hundred thirty-one thousand, two hundred twenty-two".