21630223350 has 144 divisors (see below), whose sum is σ = 59578030512. Its totient is φ = 5623188480.

The previous prime is 21630223337. The next prime is 21630223361. The reversal of 21630223350 is 5332203612.

21630223350 is a `hidden beast` number, since 2 + 1 + 6 + 302 + 2 + 3 + 350 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18130354 + ... + 18131546.

It is an arithmetic number, because the mean of its divisors is an integer number (413736323).

Almost surely, 2^21630223350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21630223350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29789015256).

21630223350 is an abundant number, since it is smaller than the sum of its proper divisors (37947807162).

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

21630223350 is a wasteful number, since it uses less digits than its factorization.

21630223350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 21630223350 its reverse (5332203612), we get a palindrome (26962426962).

The spelling of 21630223350 in words is "twenty-one billion, six hundred thirty million, two hundred twenty-three thousand, three hundred fifty".