21424335350 has 24 divisors (see below), whose sum is σ = 43471925208. Its totient is φ = 7790667200.

The previous prime is 21424335349. The next prime is 21424335353. The reversal of 21424335350 is 5353342412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424335353) 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, 19476119 + ... + 19477218.

It is an arithmetic number, because the mean of its divisors is an integer number (1811330217).

Almost surely, 2^21424335350 is an apocalyptic number.

21424335350 is an abundant number, since it is smaller than the sum of its proper divisors (22047589858).

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

21424335350 is a wasteful number, since it uses less digits than its factorization.

21424335350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38953360 (or 38953355 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 21424335350 its reverse (5353342412), we get a palindrome (26777677762).

The spelling of 21424335350 in words is "twenty-one billion, four hundred twenty-four million, three hundred thirty-five thousand, three hundred fifty".