21063070 has 32 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 7185696.

The previous prime is 21063061. The next prime is 21063071. The reversal of 21063070 is 7036012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16101 + ... + 17359.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^21063070 is an apocalyptic number.

21063070 is an abundant number, since it is smaller than the sum of its proper divisors (22482530).

21063070 is a wasteful number, since it uses less digits than its factorization.

21063070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 21063070 is about 4589.4520370083. The cubic root of 21063070 is about 276.1683405575.

Adding to 21063070 its reverse (7036012), we get a palindrome (28099082).

The spelling of 21063070 in words is "twenty-one million, sixty-three thousand, seventy".