20440142012 has 36 divisors (see below), whose sum is σ = 37813494096. Its totient is φ = 9666397440.

The previous prime is 20440142003. The next prime is 20440142017. The reversal of 20440142012 is 21024104402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440142017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 899948 + ... + 922380.

It is an arithmetic number, because the mean of its divisors is an integer number (1050374836).

Almost surely, 2^20440142012 is an apocalyptic number.

It is an amenable number.

20440142012 is a deficient number, since it is larger than the sum of its proper divisors (17373352084).

20440142012 is a wasteful number, since it uses less digits than its factorization.

20440142012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23106 (or 23085 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20440142012 its reverse (21024104402), we get a palindrome (41464246414).

The spelling of 20440142012 in words is "twenty billion, four hundred forty million, one hundred forty-two thousand, twelve".