21033083 has 2 divisors, whose sum is σ = 21033084. Its totient is φ = 21033082.

The previous prime is 21033079. The next prime is 21033119. The reversal of 21033083 is 38033012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033083 - 2² = 21033079 is a prime.

It is not a weakly prime, because it can be changed into another prime (21033053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516541 + 10516542.

It is an arithmetic number, because the mean of its divisors is an integer number (10516542).

Almost surely, 2^21033083 is an apocalyptic number.

21033083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033083 is an equidigital number, since it uses as much as digits as its factorization.

21033083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 21033083 is about 4586.1839256619. The cubic root of 21033083 is about 276.0372201782.

Adding to 21033083 its reverse (38033012), we get a palindrome (59066095).

The spelling of 21033083 in words is "twenty-one million, thirty-three thousand, eighty-three".