21063068 has 24 divisors (see below), whose sum is σ = 42032592. Its totient is φ = 9149184.

The previous prime is 21063061. The next prime is 21063071. The reversal of 21063068 is 86036012.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11030 + ... + 12797.

It is an arithmetic number, because the mean of its divisors is an integer number (1751358).

Almost surely, 2^21063068 is an apocalyptic number.

It is an amenable number.

21063068 is a deficient number, since it is larger than the sum of its proper divisors (20969524).

21063068 is a wasteful number, since it uses less digits than its factorization.

21063068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23861 (or 23859 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 21063068 is about 4589.4518191174. The cubic root of 21063068 is about 276.1683318165.

The spelling of 21063068 in words is "twenty-one million, sixty-three thousand, sixty-eight".