21224938044 has 96 divisors (see below), whose sum is σ = 50931462400. Its totient is φ = 6877301760.

The previous prime is 21224937997. The next prime is 21224938103. The reversal of 21224938044 is 44083942212.

It is a junction number, because it is equal to n+sod(n) for n = 21224937993 and 21224938011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34288767 + ... + 34289385.

Almost surely, 2^21224938044 is an apocalyptic number.

It is an amenable number.

21224938044 is an abundant number, since it is smaller than the sum of its proper divisors (29706524356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224938044 is a wasteful number, since it uses less digits than its factorization.

21224938044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 21224938044 in words is "twenty-one billion, two hundred twenty-four million, nine hundred thirty-eight thousand, forty-four".