20001444444142 has 96 divisors (see below), whose sum is σ = 36095215473504. Its totient is φ = 8283156940800.

The previous prime is 20001444444103. The next prime is 20001444444143. The reversal of 20001444444142 is 24144444410002.

It is a junction number, because it is equal to n+sod(n) for n = 20001444444098 and 20001444444107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001444444143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257575642 + ... + 257653282.

It is an arithmetic number, because the mean of its divisors is an integer number (375991827849).

Almost surely, 2^{20001444444142} is an apocalyptic number.

20001444444142 is a deficient number, since it is larger than the sum of its proper divisors (16093771029362).

20001444444142 is a wasteful number, since it uses less digits than its factorization.

20001444444142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78354 (or 78347 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 34.

Adding to 20001444444142 its reverse (24144444410002), we get a palindrome (44145888854144).

The spelling of 20001444444142 in words is "twenty trillion, one billion, four hundred forty-four million, four hundred forty-four thousand, one hundred forty-two".