21962063 has 2 divisors, whose sum is σ = 21962064. Its totient is φ = 21962062.

The previous prime is 21962051. The next prime is 21962099. The reversal of 21962063 is 36026912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21962063 is a prime.

It is a super-2 number, since 2×21962063² = 964664422431938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21962363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10981031 + 10981032.

It is an arithmetic number, because the mean of its divisors is an integer number (10981032).

Almost surely, 2^21962063 is an apocalyptic number.

21962063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21962063 is an equidigital number, since it uses as much as digits as its factorization.

21962063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 21962063 is about 4686.3699171107. The cubic root of 21962063 is about 280.0427783280.

Adding to 21962063 its reverse (36026912), we get a palindrome (57988975).

The spelling of 21962063 in words is "twenty-one million, nine hundred sixty-two thousand, sixty-three".