19964400248 has 16 divisors (see below), whose sum is σ = 40312731480. Its totient is φ = 9214338528.

The previous prime is 19964400173. The next prime is 19964400299. The reversal of 19964400248 is 84200446991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95982590 + ... + 95982797.

Almost surely, 2^19964400248 is an apocalyptic number.

It is an amenable number.

19964400248 is an abundant number, since it is smaller than the sum of its proper divisors (20348331232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19964400248 is a wasteful number, since it uses less digits than its factorization.

19964400248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191965406 (or 191965402 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 19964400248 in words is "nineteen billion, nine hundred sixty-four million, four hundred thousand, two hundred forty-eight".