21916454134 has 16 divisors (see below), whose sum is σ = 34624442880. Its totient is φ = 10375623720.

The previous prime is 21916454129. The next prime is 21916454137. The reversal of 21916454134 is 43145461912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21916454137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 93982 + ... + 229489.

It is an arithmetic number, because the mean of its divisors is an integer number (2164027680).

Almost surely, 2^21916454134 is an apocalyptic number.

21916454134 is a deficient number, since it is larger than the sum of its proper divisors (12707988746).

21916454134 is a wasteful number, since it uses less digits than its factorization.

21916454134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325275.

The product of its digits is 103680, while the sum is 40.

The spelling of 21916454134 in words is "twenty-one billion, nine hundred sixteen million, four hundred fifty-four thousand, one hundred thirty-four".