21341450 has 24 divisors (see below), whose sum is σ = 42749868. Its totient is φ = 7879680.

The previous prime is 21341407. The next prime is 21341479. The reversal of 21341450 is 5414312.

It can be written as a sum of positive squares in 6 ways, for example, as 5285401 + 16056049 = 2299^2 + 4007^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15767 + ... + 17066.

Almost surely, 2^21341450 is an apocalyptic number.

21341450 is an abundant number, since it is smaller than the sum of its proper divisors (21408418).

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

21341450 is a wasteful number, since it uses less digits than its factorization.

21341450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32858 (or 32853 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21341450 is about 4619.6807248986. The cubic root of 21341450 is about 277.3796789200.

Adding to 21341450 its reverse (5414312), we get a palindrome (26755762).

The spelling of 21341450 in words is "twenty-one million, three hundred forty-one thousand, four hundred fifty".