21059063 has 2 divisors, whose sum is σ = 21059064. Its totient is φ = 21059062.

The previous prime is 21059057. The next prime is 21059081. The reversal of 21059063 is 36095012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21059063 - 2¹⁰ = 21058039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21059023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10529531 + 10529532.

It is an arithmetic number, because the mean of its divisors is an integer number (10529532).

Almost surely, 2^21059063 is an apocalyptic number.

21059063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21059063 is an equidigital number, since it uses as much as digits as its factorization.

21059063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 21059063 is about 4589.0154717543. The cubic root of 21059063 is about 276.1508268598.

The spelling of 21059063 in words is "twenty-one million, fifty-nine thousand, sixty-three".