19161895902 has 16 divisors (see below), whose sum is σ = 38325729792. Its totient is φ = 6386975640.

The previous prime is 19161895867. The next prime is 19161895919. The reversal of 19161895902 is 20959816191.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 69213 + ... + 207639.

It is an arithmetic number, because the mean of its divisors is an integer number (2395358112).

Almost surely, 2^19161895902 is an apocalyptic number.

It is a pronic number, being equal to 138426×138427.

19161895902 is an abundant number, since it is smaller than the sum of its proper divisors (19163833890).

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

19161895902 is a wasteful number, since it uses less digits than its factorization.

19161895902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161503.

The product of its (nonzero) digits is 349920, while the sum is 51.

The spelling of 19161895902 in words is "nineteen billion, one hundred sixty-one million, eight hundred ninety-five thousand, nine hundred two".