19079997431 has 16 divisors (see below), whose sum is σ = 21521541888. Its totient is φ = 16764196800.

The previous prime is 19079997407. The next prime is 19079997451. The reversal of 19079997431 is 13479997091.

It is a cyclic number.

It is not a de Polignac number, because 19079997431 - 2²² = 19075803127 is a prime.

It is a super-2 number, since 2×19079997431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19079997401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149435 + ... + 245948.

It is an arithmetic number, because the mean of its divisors is an integer number (1345096368).

Almost surely, 2^19079997431 is an apocalyptic number.

19079997431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19079997431 is a deficient number, since it is larger than the sum of its proper divisors (2441544457).

19079997431 is a wasteful number, since it uses less digits than its factorization.

19079997431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395542.

The product of its (nonzero) digits is 3857868, while the sum is 59.

The spelling of 19079997431 in words is "nineteen billion, seventy-nine million, nine hundred ninety-seven thousand, four hundred thirty-one".