21020010330 has 32 divisors (see below), whose sum is σ = 55034209728. Its totient is φ = 5095760000.

The previous prime is 21020010329. The next prime is 21020010337. The reversal of 21020010330 is 3301002012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21020010337) 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, 31848171 + ... + 31848830.

It is an arithmetic number, because the mean of its divisors is an integer number (1719819054).

Almost surely, 2^21020010330 is an apocalyptic number.

21020010330 is an abundant number, since it is smaller than the sum of its proper divisors (34014199398).

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

21020010330 is a wasteful number, since it uses less digits than its factorization.

21020010330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63697022.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21020010330 its reverse (3301002012), we get a palindrome (24321012342).

The spelling of 21020010330 in words is "twenty-one billion, twenty million, ten thousand, three hundred thirty".