21916801158 has 32 divisors (see below), whose sum is σ = 50253606144. Its totient is φ = 6242185632.

The previous prime is 21916801147. The next prime is 21916801171. The reversal of 21916801158 is 85110861912.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 809760 + ... + 836387.

It is an arithmetic number, because the mean of its divisors is an integer number (1570425192).

Almost surely, 2^21916801158 is an apocalyptic number.

21916801158 is an abundant number, since it is smaller than the sum of its proper divisors (28336804986).

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

21916801158 is a wasteful number, since it uses less digits than its factorization.

21916801158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646476.

The product of its (nonzero) digits is 34560, while the sum is 42.

The spelling of 21916801158 in words is "twenty-one billion, nine hundred sixteen million, eight hundred one thousand, one hundred fifty-eight".