21110020330 has 64 divisors (see below), whose sum is σ = 45228575232. Its totient is φ = 6942862080.

The previous prime is 21110020303. The next prime is 21110020339. The reversal of 21110020330 is 3302001112.

It is a self number, because there is not a number n which added to its sum of digits gives 21110020330.

It is not an unprimeable number, because it can be changed into a prime (21110020339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126492 + ... + 241288.

It is an arithmetic number, because the mean of its divisors is an integer number (706696488).

Almost surely, 2^21110020330 is an apocalyptic number.

21110020330 is an abundant number, since it is smaller than the sum of its proper divisors (24118554902).

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

21110020330 is a wasteful number, since it uses less digits than its factorization.

21110020330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114919.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21110020330 its reverse (3302001112), we get a palindrome (24412021442).

The spelling of 21110020330 in words is "twenty-one billion, one hundred ten million, twenty thousand, three hundred thirty".