21354050 has 12 divisors (see below), whose sum is σ = 39718626. Its totient is φ = 8541600.

The previous prime is 21354049. The next prime is 21354059. The reversal of 21354050 is 5045312.

It can be written as a sum of positive squares in 3 ways, for example, as 15531481 + 5822569 = 3941^2 + 2413^2 .

It is not an unprimeable number, because it can be changed into a prime (21354059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213491 + ... + 213590.

Almost surely, 2^21354050 is an apocalyptic number.

21354050 is a deficient number, since it is larger than the sum of its proper divisors (18364576).

21354050 is a wasteful number, since it uses less digits than its factorization.

21354050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427093 (or 427088 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 21354050 is about 4621.0442542785. The cubic root of 21354050 is about 277.4342565357.

Adding to 21354050 its reverse (5045312), we get a palindrome (26399362).

The spelling of 21354050 in words is "twenty-one million, three hundred fifty-four thousand, fifty".