21480059 has 2 divisors, whose sum is σ = 21480060. Its totient is φ = 21480058.

The previous prime is 21480049. The next prime is 21480073. The reversal of 21480059 is 95008412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21480059 is a prime.

It is a super-2 number, since 2×21480059² = 922785869286962, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21480049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10740029 + 10740030.

It is an arithmetic number, because the mean of its divisors is an integer number (10740030).

Almost surely, 2^21480059 is an apocalyptic number.

21480059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21480059 is an equidigital number, since it uses as much as digits as its factorization.

21480059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21480059 is about 4634.6584555930. The cubic root of 21480059 is about 277.9788944176.

The spelling of 21480059 in words is "twenty-one million, four hundred eighty thousand, fifty-nine".