21134127786 has 8 divisors (see below), whose sum is σ = 42268255584. Its totient is φ = 7044709260.

The previous prime is 21134127713. The next prime is 21134127799. The reversal of 21134127786 is 68772143112.

It is a sphenic number, since it is the product of 3 distinct primes.

21134127786 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761177310 + ... + 1761177321.

It is an arithmetic number, because the mean of its divisors is an integer number (5283531948).

Almost surely, 2^21134127786 is an apocalyptic number.

21134127786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21134127786 is a wasteful number, since it uses less digits than its factorization.

21134127786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522354636.

The product of its digits is 112896, while the sum is 42.

The spelling of 21134127786 in words is "twenty-one billion, one hundred thirty-four million, one hundred twenty-seven thousand, seven hundred eighty-six".