21327677446 has 4 divisors (see below), whose sum is σ = 31991516172. Its totient is φ = 10663838722.

The previous prime is 21327677443. The next prime is 21327677453. The reversal of 21327677446 is 64477672312.

It is a semiprime because it is the product of two primes.

It is a super-5 number, since 5×21327677446⁵ (a number of 53 digits) contains 55555 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21327677446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327677443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5331919360 + ... + 5331919363.

It is an arithmetic number, because the mean of its divisors is an integer number (7997879043).

Almost surely, 2^21327677446 is an apocalyptic number.

21327677446 is a deficient number, since it is larger than the sum of its proper divisors (10663838726).

21327677446 is a wasteful number, since it uses less digits than its factorization.

21327677446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10663838725.

The product of its digits is 2370816, while the sum is 49.

The spelling of 21327677446 in words is "twenty-one billion, three hundred twenty-seven million, six hundred seventy-seven thousand, four hundred forty-six".