20440144142 has 8 divisors (see below), whose sum is σ = 33447508632. Its totient is φ = 9290974600.

The previous prime is 20440144133. The next prime is 20440144163. The reversal of 20440144142 is 24144104402.

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

It is a congruent number.

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, 464548709 + ... + 464548752.

It is an arithmetic number, because the mean of its divisors is an integer number (4180938579).

Almost surely, 2^20440144142 is an apocalyptic number.

20440144142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20440144142 is a deficient number, since it is larger than the sum of its proper divisors (13007364490).

20440144142 is a wasteful number, since it uses less digits than its factorization.

20440144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929097474.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 20440144142 its reverse (24144104402), we get a palindrome (44584248544).

The spelling of 20440144142 in words is "twenty billion, four hundred forty million, one hundred forty-four thousand, one hundred forty-two".