21423332200 has 96 divisors (see below), whose sum is σ = 52950852000. Its totient is φ = 8037792000.

The previous prime is 21423332179. The next prime is 21423332237. The reversal of 21423332200 is 223332412.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355891 + ... + 411709.

It is an arithmetic number, because the mean of its divisors is an integer number (551571375).

Almost surely, 2^21423332200 is an apocalyptic number.

21423332200 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 21423332200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26475426000).

21423332200 is an abundant number, since it is smaller than the sum of its proper divisors (31527519800).

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

21423332200 is a wasteful number, since it uses less digits than its factorization.

21423332200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55955 (or 55946 counting only the distinct ones).

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

Adding to 21423332200 its reverse (223332412), we get a palindrome (21646664612).

The spelling of 21423332200 in words is "twenty-one billion, four hundred twenty-three million, three hundred thirty-two thousand, two hundred".