20403111142 has 4 divisors (see below), whose sum is σ = 30604666716. Its totient is φ = 10201555570.

The previous prime is 20403111139. The next prime is 20403111161. The reversal of 20403111142 is 24111130402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24111130402 = 2 ⋅12055565201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100777784 + ... + 5100777787.

It is an arithmetic number, because the mean of its divisors is an integer number (7651166679).

Almost surely, 2^20403111142 is an apocalyptic number.

20403111142 is a deficient number, since it is larger than the sum of its proper divisors (10201555574).

20403111142 is a wasteful number, since it uses less digits than its factorization.

20403111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201555573.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20403111142 its reverse (24111130402), we get a palindrome (44514241544).

The spelling of 20403111142 in words is "twenty billion, four hundred three million, one hundred eleven thousand, one hundred forty-two".