21423430300 has 36 divisors (see below), whose sum is σ = 47011209840. Its totient is φ = 8473083520.

The previous prime is 21423430291. The next prime is 21423430309. The reversal of 21423430300 is 303432412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21423430291) and next prime (21423430309).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423430309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1194664 + ... + 1212463.

It is an arithmetic number, because the mean of its divisors is an integer number (1305866940).

Almost surely, 2^21423430300 is an apocalyptic number.

21423430300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423430300 is an abundant number, since it is smaller than the sum of its proper divisors (25587779540).

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

21423430300 is a wasteful number, since it uses less digits than its factorization.

21423430300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407230 (or 2407223 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21423430300 its reverse (303432412), we get a palindrome (21726862712).

The spelling of 21423430300 in words is "twenty-one billion, four hundred twenty-three million, four hundred thirty thousand, three hundred".