21020332302 has 32 divisors (see below), whose sum is σ = 47174355360. Its totient is φ = 6937401600.

The previous prime is 21020332297. The next prime is 21020332309. The reversal of 21020332302 is 20323302012.

It is a happy number.

21020332302 is a `hidden beast` number, since 2 + 10 + 20 + 332 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020332309) 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, 1921603 + ... + 1932510.

It is an arithmetic number, because the mean of its divisors is an integer number (1474198605).

Almost surely, 2^21020332302 is an apocalyptic number.

21020332302 is an abundant number, since it is smaller than the sum of its proper divisors (26154023058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21020332302 is a wasteful number, since it uses less digits than its factorization.

21020332302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854225 (or 3854219 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21020332302 its reverse (20323302012), we get a palindrome (41343634314).

The spelling of 21020332302 in words is "twenty-one billion, twenty million, three hundred thirty-two thousand, three hundred two".