21224020264444 has 12 divisors (see below), whose sum is σ = 37161573632568. Its totient is φ = 10606427798000.

The previous prime is 21224020264397. The next prime is 21224020264459. The reversal of 21224020264444 is 44446202042212.

It is a congruent 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, 1395575002 + ... + 1395590209.

It is an arithmetic number, because the mean of its divisors is an integer number (3096797802714).

Almost surely, 2^{21224020264444} is an apocalyptic number.

It is an amenable number.

21224020264444 is a deficient number, since it is larger than the sum of its proper divisors (15937553368124).

21224020264444 is a wasteful number, since it uses less digits than its factorization.

21224020264444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791167116 (or 2791167114 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 37.

The spelling of 21224020264444 in words is "twenty-one trillion, two hundred twenty-four billion, twenty million, two hundred sixty-four thousand, four hundred forty-four".