20440431224142 has 16 divisors (see below), whose sum is σ = 40885319209680. Its totient is φ = 6812734281152.

The previous prime is 20440431224137. The next prime is 20440431224159. The reversal of 20440431224142 is 24142213404402.

It is a super-2 number, since 2×20440431224142² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185638767 + ... + 185748842.

It is an arithmetic number, because the mean of its divisors is an integer number (2555332450605).

Almost surely, 2^{20440431224142} is an apocalyptic number.

20440431224142 is an abundant number, since it is smaller than the sum of its proper divisors (20444887985538).

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

20440431224142 is a wasteful number, since it uses less digits than its factorization.

20440431224142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371396787.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 20440431224142 its reverse (24142213404402), we get a palindrome (44582644628544).

The spelling of 20440431224142 in words is "twenty trillion, four hundred forty billion, four hundred thirty-one million, two hundred twenty-four thousand, one hundred forty-two".