21134194757 has 16 divisors (see below), whose sum is σ = 22863982848. Its totient is φ = 19419454080.

The previous prime is 21134194751. The next prime is 21134194777. The reversal of 21134194757 is 75749143112.

It is not a de Polignac number, because 21134194757 - 2⁶ = 21134194693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134194751) 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 15 ways as a sum of consecutive naturals, for example, 3345632 + ... + 3351942.

It is an arithmetic number, because the mean of its divisors is an integer number (1428998928).

Almost surely, 2^21134194757 is an apocalyptic number.

It is an amenable number.

21134194757 is a deficient number, since it is larger than the sum of its proper divisors (1729788091).

21134194757 is a wasteful number, since it uses less digits than its factorization.

21134194757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7460.

The product of its digits is 211680, while the sum is 44.

The spelling of 21134194757 in words is "twenty-one billion, one hundred thirty-four million, one hundred ninety-four thousand, seven hundred fifty-seven".