21500483 has 2 divisors, whose sum is σ = 21500484. Its totient is φ = 21500482.

The previous prime is 21500477. The next prime is 21500489. The reversal of 21500483 is 38400512.

It is a balanced prime because it is at equal distance from previous prime (21500477) and next prime (21500489).

It is a cyclic number.

It is not a de Polignac number, because 21500483 - 2¹⁰ = 21499459 is a prime.

It is not a weakly prime, because it can be changed into another prime (21500489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10750241 + 10750242.

It is an arithmetic number, because the mean of its divisors is an integer number (10750242).

Almost surely, 2^21500483 is an apocalyptic number.

21500483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21500483 is an equidigital number, since it uses as much as digits as its factorization.

21500483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21500483 is about 4636.8613306848. The cubic root of 21500483 is about 278.0669705638.

Adding to 21500483 its reverse (38400512), we get a palindrome (59900995).

The spelling of 21500483 in words is "twenty-one million, five hundred thousand, four hundred eighty-three".