19884962431 has 4 divisors (see below), whose sum is σ = 20526412864. Its totient is φ = 19243512000.

The previous prime is 19884962417. The next prime is 19884962459. The reversal of 19884962431 is 13426948891.

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 19884962431 - 2⁹ = 19884961919 is a prime.

It is a super-4 number, since 4×19884962431⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19884962231) 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, 320725170 + ... + 320725231.

It is an arithmetic number, because the mean of its divisors is an integer number (5131603216).

Almost surely, 2^19884962431 is an apocalyptic number.

19884962431 is the 81415-th hex number.

19884962431 is a deficient number, since it is larger than the sum of its proper divisors (641450433).

19884962431 is an equidigital number, since it uses as much as digits as its factorization.

19884962431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641450432.

The product of its digits is 2985984, while the sum is 55.

The spelling of 19884962431 in words is "nineteen billion, eight hundred eighty-four million, nine hundred sixty-two thousand, four hundred thirty-one".