21203020300 has 108 divisors (see below), whose sum is σ = 58388309784. Its totient is φ = 6608716800.

The previous prime is 21203020297. The next prime is 21203020339. The reversal of 21203020300 is 302030212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142789 + ... + 250588.

It is an arithmetic number, because the mean of its divisors is an integer number (540632498).

Almost surely, 2^21203020300 is an apocalyptic number.

21203020300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203020300 is an abundant number, since it is smaller than the sum of its proper divisors (37185289484).

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

21203020300 is a wasteful number, since it uses less digits than its factorization.

21203020300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393416 (or 393402 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21203020300 its reverse (302030212), we get a palindrome (21505050512).

The spelling of 21203020300 in words is "twenty-one billion, two hundred three million, twenty thousand, three hundred".