21074304250 has 16 divisors (see below), whose sum is σ = 39451098024. Its totient is φ = 8429721600.

The previous prime is 21074304241. The next prime is 21074304253. The reversal of 21074304250 is 5240347012.

It can be written as a sum of positive squares in 4 ways, for example, as 11450498049 + 9623806201 = 107007^2 + 98101^2 .

It is not an unprimeable number, because it can be changed into a prime (21074304253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42148359 + ... + 42148858.

Almost surely, 2^21074304250 is an apocalyptic number.

21074304250 is a deficient number, since it is larger than the sum of its proper divisors (18376793774).

21074304250 is an equidigital number, since it uses as much as digits as its factorization.

21074304250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84297234 (or 84297224 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 21074304250 in words is "twenty-one billion, seventy-four million, three hundred four thousand, two hundred fifty".