21244565450 has 48 divisors (see below), whose sum is σ = 40069935360. Its totient is φ = 8378760000.

The previous prime is 21244565431. The next prime is 21244565521. The reversal of 21244565450 is 5456544212.

It is a super-2 number, since 2×21244565450² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3239675 + ... + 3246225.

It is an arithmetic number, because the mean of its divisors is an integer number (834790320).

Almost surely, 2^21244565450 is an apocalyptic number.

21244565450 is a deficient number, since it is larger than the sum of its proper divisors (18825369910).

21244565450 is a wasteful number, since it uses less digits than its factorization.

21244565450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463 (or 7458 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 21244565450 in words is "twenty-one billion, two hundred forty-four million, five hundred sixty-five thousand, four hundred fifty".