20034431999 has 4 divisors (see below), whose sum is σ = 20039184840. Its totient is φ = 20029679160.

The previous prime is 20034431987. The next prime is 20034432001. The reversal of 20034431999 is 99913443002.

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-20034431999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20034431939) 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, 2370092 + ... + 2378529.

It is an arithmetic number, because the mean of its divisors is an integer number (5009796210).

Almost surely, 2^20034431999 is an apocalyptic number.

20034431999 is a deficient number, since it is larger than the sum of its proper divisors (4752841).

20034431999 is an equidigital number, since it uses as much as digits as its factorization.

20034431999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752840.

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 20034431999 in words is "twenty billion, thirty-four million, four hundred thirty-one thousand, nine hundred ninety-nine".