19995401642 has 8 divisors (see below), whose sum is σ = 30022196832. Its totient is φ = 9988002700.

The previous prime is 19995401633. The next prime is 19995401687. The reversal of 19995401642 is 24610459991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 4846484 + ... + 4850607.

It is an arithmetic number, because the mean of its divisors is an integer number (3752774604).

Almost surely, 2^19995401642 is an apocalyptic number.

19995401642 is a deficient number, since it is larger than the sum of its proper divisors (10026795190).

19995401642 is a wasteful number, since it uses less digits than its factorization.

19995401642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9698124.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 19995401642 in words is "nineteen billion, nine hundred ninety-five million, four hundred one thousand, six hundred forty-two".