21354034224 has 40 divisors (see below), whose sum is σ = 55182135280. Its totient is φ = 7115747328.

The previous prime is 21354034211. The next prime is 21354034253. The reversal of 21354034224 is 42243045312.

It is a junction number, because it is equal to n+sod(n) for n = 21354034191 and 21354034200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85272 + ... + 223560.

It is an arithmetic number, because the mean of its divisors is an integer number (1379553382).

Almost surely, 2^21354034224 is an apocalyptic number.

21354034224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21354034224 is an abundant number, since it is smaller than the sum of its proper divisors (33828101056).

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

21354034224 is a wasteful number, since it uses less digits than its factorization.

21354034224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141517 (or 141511 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21354034224 its reverse (42243045312), we get a palindrome (63597079536).

The spelling of 21354034224 in words is "twenty-one billion, three hundred fifty-four million, thirty-four thousand, two hundred twenty-four".