21847244264 has 16 divisors (see below), whose sum is σ = 41916225120. Its totient is φ = 10669584240.

The previous prime is 21847244261. The next prime is 21847244333. The reversal of 21847244264 is 46244274812.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21847244261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31754372 + ... + 31755059.

It is an arithmetic number, because the mean of its divisors is an integer number (2619764070).

Almost surely, 2^21847244264 is an apocalyptic number.

It is an amenable number.

21847244264 is a deficient number, since it is larger than the sum of its proper divisors (20068980856).

21847244264 is a wasteful number, since it uses less digits than its factorization.

21847244264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63509480 (or 63509476 counting only the distinct ones).

The product of its digits is 688128, while the sum is 44.

The spelling of 21847244264 in words is "twenty-one billion, eight hundred forty-seven million, two hundred forty-four thousand, two hundred sixty-four".