21450000300 has 72 divisors (see below), whose sum is σ = 62154261456. Its totient is φ = 5711496960.

The previous prime is 21450000251. The next prime is 21450000301. The reversal of 21450000300 is 300005412.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21450000300.

It is not an unprimeable number, because it can be changed into a prime (21450000301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150294 + ... + 255906.

Almost surely, 2^21450000300 is an apocalyptic number.

21450000300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21450000300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31077130728).

21450000300 is an abundant number, since it is smaller than the sum of its proper divisors (40704261156).

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

21450000300 is a wasteful number, since it uses less digits than its factorization.

21450000300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106307 (or 106300 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

Adding to 21450000300 its reverse (300005412), we get a palindrome (21750005712).

The spelling of 21450000300 in words is "twenty-one billion, four hundred fifty million, three hundred", and thus it is an aban number.