19821609058 has 16 divisors (see below), whose sum is σ = 31331687040. Its totient is φ = 9378860400.

The previous prime is 19821609029. The next prime is 19821609089. The reversal of 19821609058 is 85090612891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251673 + ... + 320908.

It is an arithmetic number, because the mean of its divisors is an integer number (1958230440).

Almost surely, 2^19821609058 is an apocalyptic number.

19821609058 is a deficient number, since it is larger than the sum of its proper divisors (11510077982).

19821609058 is a wasteful number, since it uses less digits than its factorization.

19821609058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573513.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 19821609058 in words is "nineteen billion, eight hundred twenty-one million, six hundred nine thousand, fifty-eight".