31304400019 has 4 divisors (see below), whose sum is σ = 32952000040. Its totient is φ = 29656800000.

The previous prime is 31304400013. The next prime is 31304400047. The reversal of 31304400019 is 91000440313.

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 31304400019 - 2²⁵ = 31270845587 is a prime.

It is a super-2 number, since 2×31304400019² (a number of 22 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 = 31304399966 and 31304400002.

It is not an unprimeable number, because it can be changed into a prime (31304400013) 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 3 ways as a sum of consecutive naturals, for example, 823799982 + ... + 823800019.

It is an arithmetic number, because the mean of its divisors is an integer number (8238000010).

Almost surely, 2^31304400019 is an apocalyptic number.

31304400019 is a deficient number, since it is larger than the sum of its proper divisors (1647600021).

31304400019 is a wasteful number, since it uses less digits than its factorization.

31304400019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647600020.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 31304400019 in words is "thirty-one billion, three hundred four million, four hundred thousand, nineteen".