21062959 has 2 divisors, whose sum is σ = 21062960. Its totient is φ = 21062958.

The previous prime is 21062957. The next prime is 21062989. The reversal of 21062959 is 95926012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21062959 - 2¹ = 21062957 is a prime.

Together with 21062957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21062957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531479 + 10531480.

It is an arithmetic number, because the mean of its divisors is an integer number (10531480).

Almost surely, 2^21062959 is an apocalyptic number.

21062959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21062959 is an equidigital number, since it uses as much as digits as its factorization.

21062959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 21062959 is about 4589.4399440455. The cubic root of 21062959 is about 276.1678554313.

It can be divided in two parts, 2 and 1062959, that added together give a square (1062961 = 1031²).

The spelling of 21062959 in words is "twenty-one million, sixty-two thousand, nine hundred fifty-nine".