21365050 has 24 divisors (see below), whose sum is σ = 45416736. Its totient is φ = 7325040.

The previous prime is 21365041. The next prime is 21365077. The reversal of 21365050 is 5056312.

It is a happy 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, 30172 + ... + 30871.

It is an arithmetic number, because the mean of its divisors is an integer number (1892364).

Almost surely, 2^21365050 is an apocalyptic number.

21365050 is an abundant number, since it is smaller than the sum of its proper divisors (24051686).

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

21365050 is a wasteful number, since it uses less digits than its factorization.

21365050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61062 (or 61057 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 21365050 is about 4622.2343082107. The cubic root of 21365050 is about 277.4818861103.

The spelling of 21365050 in words is "twenty-one million, three hundred sixty-five thousand, fifty".