16194361931 has 4 divisors (see below), whose sum is σ = 17666576664. Its totient is φ = 14722147200.

The previous prime is 16194361921. The next prime is 16194361943. The reversal of 16194361931 is 13916349161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16194361931 is a prime.

It is a super-2 number, since 2×16194361931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16194361921) 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, 736107350 + ... + 736107371.

It is an arithmetic number, because the mean of its divisors is an integer number (4416644166).

Almost surely, 2^16194361931 is an apocalyptic number.

16194361931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16194361931 is a deficient number, since it is larger than the sum of its proper divisors (1472214733).

16194361931 is a wasteful number, since it uses less digits than its factorization.

16194361931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472214732.

The product of its digits is 104976, while the sum is 44.

The spelling of 16194361931 in words is "sixteen billion, one hundred ninety-four million, three hundred sixty-one thousand, nine hundred thirty-one".