20445010142 has 4 divisors (see below), whose sum is σ = 30667515216. Its totient is φ = 10222505070.

The previous prime is 20445010111. The next prime is 20445010153. The reversal of 20445010142 is 24101054402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111252534 + ... + 5111252537.

It is an arithmetic number, because the mean of its divisors is an integer number (7666878804).

Almost surely, 2^20445010142 is an apocalyptic number.

20445010142 is a deficient number, since it is larger than the sum of its proper divisors (10222505074).

20445010142 is a wasteful number, since it uses less digits than its factorization.

20445010142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222505073.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 20445010142 its reverse (24101054402), we get a palindrome (44546064544).

The spelling of 20445010142 in words is "twenty billion, four hundred forty-five million, ten thousand, one hundred forty-two".