21719095092 has 72 divisors (see below), whose sum is σ = 57925445760. Its totient is φ = 6842655360.

The previous prime is 21719095067. The next prime is 21719095121. The reversal of 21719095092 is 29059091712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257968 + ... + 331640.

It is an arithmetic number, because the mean of its divisors is an integer number (804520080).

Almost surely, 2^21719095092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21719095092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28962722880).

21719095092 is an abundant number, since it is smaller than the sum of its proper divisors (36206350668).

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

21719095092 is a wasteful number, since it uses less digits than its factorization.

21719095092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74133 (or 74128 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The spelling of 21719095092 in words is "twenty-one billion, seven hundred nineteen million, ninety-five thousand, ninety-two".