19734900431 has 4 divisors (see below), whose sum is σ = 19739161032. Its totient is φ = 19730639832.

The previous prime is 19734900401. The next prime is 19734900509. The reversal of 19734900431 is 13400943791.

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 19734900431 - 2²⁶ = 19667791567 is a prime.

It is a super-2 number, since 2×19734900431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19734900401) 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, 2123345 + ... + 2132618.

It is an arithmetic number, because the mean of its divisors is an integer number (4934790258).

Almost surely, 2^19734900431 is an apocalyptic number.

19734900431 is a deficient number, since it is larger than the sum of its proper divisors (4260601).

19734900431 is an equidigital number, since it uses as much as digits as its factorization.

19734900431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260600.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 19734900431 in words is "nineteen billion, seven hundred thirty-four million, nine hundred thousand, four hundred thirty-one".