21066312602 has 8 divisors (see below), whose sum is σ = 31617196896. Its totient is φ = 10527246972.

The previous prime is 21066312593. The next prime is 21066312611. The reversal of 21066312602 is 20621366012.

It is an interprime number because it is at equal distance from previous prime (21066312593) and next prime (21066312611).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950208 + ... + 2957339.

It is an arithmetic number, because the mean of its divisors is an integer number (3952149612).

Almost surely, 2^21066312602 is an apocalyptic number.

21066312602 is a deficient number, since it is larger than the sum of its proper divisors (10550884294).

21066312602 is a wasteful number, since it uses less digits than its factorization.

21066312602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909332.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 21066312602 its reverse (20621366012), we get a palindrome (41687678614).

The spelling of 21066312602 in words is "twenty-one billion, sixty-six million, three hundred twelve thousand, six hundred two".