19900042582 has 48 divisors (see below), whose sum is σ = 35312088240. Its totient is φ = 8385249600.

The previous prime is 19900042577. The next prime is 19900042601. The reversal of 19900042582 is 28524000991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1392232 + ... + 1406452.

It is an arithmetic number, because the mean of its divisors is an integer number (735668505).

Almost surely, 2^19900042582 is an apocalyptic number.

19900042582 is a deficient number, since it is larger than the sum of its proper divisors (15412045658).

19900042582 is a wasteful number, since it uses less digits than its factorization.

19900042582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14477 (or 14470 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 19900042582 in words is "nineteen billion, nine hundred million, forty-two thousand, five hundred eighty-two".