21360350 has 48 divisors (see below), whose sum is σ = 44032896. Its totient is φ = 7644000.

The previous prime is 21360331. The next prime is 21360371. The reversal of 21360350 is 5306312.

It is a congruent number.

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, 38777 + ... + 39323.

It is an arithmetic number, because the mean of its divisors is an integer number (917352).

Almost surely, 2^21360350 is an apocalyptic number.

21360350 is an abundant number, since it is smaller than the sum of its proper divisors (22672546).

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

21360350 is a wasteful number, since it uses less digits than its factorization.

21360350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 21360350 is about 4621.7258681146. The cubic root of 21360350 is about 277.4615372929.

Adding to 21360350 its reverse (5306312), we get a palindrome (26666662).

The spelling of 21360350 in words is "twenty-one million, three hundred sixty thousand, three hundred fifty".