194020112731 has 4 divisors (see below), whose sum is σ = 194874827112. Its totient is φ = 193165398352.

The previous prime is 194020112723. The next prime is 194020112743. The reversal of 194020112731 is 137211020491.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 194020112731 - 2³ = 194020112723 is a prime.

It is a super-2 number, since 2×194020112731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194020112693 and 194020112702.

It is not an unprimeable number, because it can be changed into a prime (194020112791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427356850 + ... + 427357303.

It is an arithmetic number, because the mean of its divisors is an integer number (48718706778).

Almost surely, 2^194020112731 is an apocalyptic number.

194020112731 is a deficient number, since it is larger than the sum of its proper divisors (854714381).

194020112731 is an equidigital number, since it uses as much as digits as its factorization.

194020112731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854714380.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 194020112731 in words is "one hundred ninety-four billion, twenty million, one hundred twelve thousand, seven hundred thirty-one".