21235424350 has 24 divisors (see below), whose sum is σ = 45140445648. Its totient is φ = 7280716800.

The previous prime is 21235424341. The next prime is 21235424369. The reversal of 21235424350 is 5342453212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30335971 + ... + 30336670.

It is an arithmetic number, because the mean of its divisors is an integer number (1880851902).

Almost surely, 2^21235424350 is an apocalyptic number.

21235424350 is an abundant number, since it is smaller than the sum of its proper divisors (23905021298).

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

21235424350 is a wasteful number, since it uses less digits than its factorization.

21235424350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60672660 (or 60672655 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 21235424350 its reverse (5342453212), we get a palindrome (26577877562).

The spelling of 21235424350 in words is "twenty-one billion, two hundred thirty-five million, four hundred twenty-four thousand, three hundred fifty".