21447002750 has 32 divisors (see below), whose sum is σ = 40230788832. Its totient is φ = 8561280000.

The previous prime is 21447002747. The next prime is 21447002779. The reversal of 21447002750 is 5720074412.

It is a congruent number.

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, 35390 + ... + 210110.

It is an arithmetic number, because the mean of its divisors is an integer number (1257212151).

Almost surely, 2^21447002750 is an apocalyptic number.

21447002750 is a deficient number, since it is larger than the sum of its proper divisors (18783786082).

21447002750 is a wasteful number, since it uses less digits than its factorization.

21447002750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175229 (or 175219 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The spelling of 21447002750 in words is "twenty-one billion, four hundred forty-seven million, two thousand, seven hundred fifty".