19139756142 has 16 divisors (see below), whose sum is σ = 41224090320. Its totient is φ = 5889155712.

The previous prime is 19139756131. The next prime is 19139756143. The reversal of 19139756142 is 24165793191.

It is a junction number, because it is equal to n+sod(n) for n = 19139756091 and 19139756100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19139756143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122690667 + ... + 122690822.

It is an arithmetic number, because the mean of its divisors is an integer number (2576505645).

Almost surely, 2^19139756142 is an apocalyptic number.

19139756142 is an abundant number, since it is smaller than the sum of its proper divisors (22084334178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19139756142 is a wasteful number, since it uses less digits than its factorization.

19139756142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245381507.

The product of its digits is 408240, while the sum is 48.

The spelling of 19139756142 in words is "nineteen billion, one hundred thirty-nine million, seven hundred fifty-six thousand, one hundred forty-two".