21041550244 has 48 divisors (see below), whose sum is σ = 43280629056. Its totient is φ = 8824464000.

The previous prime is 21041550203. The next prime is 21041550307. The reversal of 21041550244 is 44205514012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1409419 + ... + 1424269.

It is an arithmetic number, because the mean of its divisors is an integer number (901679772).

Almost surely, 2^21041550244 is an apocalyptic number.

It is an amenable number.

21041550244 is an abundant number, since it is smaller than the sum of its proper divisors (22239078812).

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

21041550244 is a wasteful number, since it uses less digits than its factorization.

21041550244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17356 (or 17354 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 21041550244 in words is "twenty-one billion, forty-one million, five hundred fifty thousand, two hundred forty-four".