21134255421746 has 8 divisors (see below), whose sum is σ = 31981926346524. Its totient is φ = 10473613306240.

The previous prime is 21134255421733. The next prime is 21134255421779. The reversal of 21134255421746 is 64712455243112.

It can be written as a sum of positive squares in 2 ways, for example, as 17768846826721 + 3365408595025 = 4215311^2 + 1834505^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21134255421746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46757202035 + ... + 46757202486.

Almost surely, 2^{21134255421746} is an apocalyptic number.

21134255421746 is a deficient number, since it is larger than the sum of its proper divisors (10847670924778).

21134255421746 is a wasteful number, since it uses less digits than its factorization.

21134255421746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93514404636.

The product of its digits is 1612800, while the sum is 47.

The spelling of 21134255421746 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred fifty-five million, four hundred twenty-one thousand, seven hundred forty-six".