21916135770 has 32 divisors (see below), whose sum is σ = 55367081280. Its totient is φ = 5536707840.

The previous prime is 21916135733. The next prime is 21916135781. The reversal of 21916135770 is 7753161912.

21916135770 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 19224111 + ... + 19225250.

It is an arithmetic number, because the mean of its divisors is an integer number (1730221290).

Almost surely, 2^21916135770 is an apocalyptic number.

21916135770 is an abundant number, since it is smaller than the sum of its proper divisors (33450945510).

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

21916135770 is a wasteful number, since it uses less digits than its factorization.

21916135770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38449390.

The product of its (nonzero) digits is 79380, while the sum is 42.

The spelling of 21916135770 in words is "twenty-one billion, nine hundred sixteen million, one hundred thirty-five thousand, seven hundred seventy".