20440142102 has 16 divisors (see below), whose sum is σ = 31177969200. Its totient is φ = 10048769280.

The previous prime is 20440142081. The next prime is 20440142119. The reversal of 20440142102 is 20124104402.

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, 288899 + ... + 352622.

It is an arithmetic number, because the mean of its divisors is an integer number (1948623075).

Almost surely, 2^20440142102 is an apocalyptic number.

20440142102 is a deficient number, since it is larger than the sum of its proper divisors (10737827098).

20440142102 is a wasteful number, since it uses less digits than its factorization.

20440142102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641791.

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

Adding to 20440142102 its reverse (20124104402), we get a palindrome (40564246504).

The spelling of 20440142102 in words is "twenty billion, four hundred forty million, one hundred forty-two thousand, one hundred two".