21203020330 has 32 divisors (see below), whose sum is σ = 41013625536. Its totient is φ = 7863170304.

The previous prime is 21203020297. The next prime is 21203020339. The reversal of 21203020330 is 3302030212.

It is a super-2 number, since 2×21203020330² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21203020339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919384 + ... + 942163.

It is an arithmetic number, because the mean of its divisors is an integer number (1281675798).

Almost surely, 2^21203020330 is an apocalyptic number.

21203020330 is a deficient number, since it is larger than the sum of its proper divisors (19810605206).

21203020330 is a wasteful number, since it uses less digits than its factorization.

21203020330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861638.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21203020330 its reverse (3302030212), we get a palindrome (24505050542).

The spelling of 21203020330 in words is "twenty-one billion, two hundred three million, twenty thousand, three hundred thirty".