21446138026 has 8 divisors (see below), whose sum is σ = 32180050980. Its totient is φ = 10719454368.

The previous prime is 21446138011. The next prime is 21446138039. The reversal of 21446138026 is 62083164412.

It is a Cunningham number, because it is equal to 146445²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 21446138025 + 1 = 146445^2 + 1^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1799901 + ... + 1811776.

Almost surely, 2^21446138026 is an apocalyptic number.

21446138026 is a deficient number, since it is larger than the sum of its proper divisors (10733912954).

21446138026 is a wasteful number, since it uses less digits than its factorization.

21446138026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614648.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 21446138026 in words is "twenty-one billion, four hundred forty-six million, one hundred thirty-eight thousand, twenty-six".