19161366142 has 4 divisors (see below), whose sum is σ = 28742049216. Its totient is φ = 9580683070.

The previous prime is 19161366137. The next prime is 19161366149. The reversal of 19161366142 is 24166316191.

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

It is a junction number, because it is equal to n+sod(n) for n = 19161366095 and 19161366104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19161366149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4790341534 + ... + 4790341537.

It is an arithmetic number, because the mean of its divisors is an integer number (7185512304).

Almost surely, 2^19161366142 is an apocalyptic number.

19161366142 is a deficient number, since it is larger than the sum of its proper divisors (9580683074).

19161366142 is an equidigital number, since it uses as much as digits as its factorization.

19161366142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9580683073.

The product of its digits is 46656, while the sum is 40.

The spelling of 19161366142 in words is "nineteen billion, one hundred sixty-one million, three hundred sixty-six thousand, one hundred forty-two".