19949311602 has 96 divisors (see below), whose sum is σ = 49250073600. Its totient is φ = 5776884960.

The previous prime is 19949311601. The next prime is 19949311621. The reversal of 19949311602 is 20611394991.

19949311602 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 9 + 31 + 1 + 602 = 666.

19949311602 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (19949311601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9503149 + ... + 9505247.

It is an arithmetic number, because the mean of its divisors is an integer number (513021600).

Almost surely, 2^19949311602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19949311602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24625036800).

19949311602 is an abundant number, since it is smaller than the sum of its proper divisors (29300761998).

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

19949311602 is a wasteful number, since it uses less digits than its factorization.

19949311602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228 (or 4225 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 19949311602 in words is "nineteen billion, nine hundred forty-nine million, three hundred eleven thousand, six hundred two".