21370483 has 2 divisors, whose sum is σ = 21370484. Its totient is φ = 21370482.

The previous prime is 21370463. The next prime is 21370499. The reversal of 21370483 is 38407312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21370483 - 2⁵ = 21370451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21370463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10685241 + 10685242.

It is an arithmetic number, because the mean of its divisors is an integer number (10685242).

Almost surely, 2^21370483 is an apocalyptic number.

21370483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21370483 is an equidigital number, since it uses as much as digits as its factorization.

21370483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21370483 is about 4622.8219736434. The cubic root of 21370483 is about 277.5054047591.

Adding to 21370483 its reverse (38407312), we get a palindrome (59777795).

The spelling of 21370483 in words is "twenty-one million, three hundred seventy thousand, four hundred eighty-three".