21427150 has 24 divisors (see below), whose sum is σ = 40258584. Its totient is φ = 8484000.

The previous prime is 21427141. The next prime is 21427171. The reversal of 21427150 is 5172412.

It is a happy number.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

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, 2929 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (1677441).

Almost surely, 2^21427150 is an apocalyptic number.

21427150 is a deficient number, since it is larger than the sum of its proper divisors (18831434).

21427150 is a wasteful number, since it uses less digits than its factorization.

21427150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21427150 is about 4628.9469644834. The cubic root of 21427150 is about 277.7504705008.

Adding to 21427150 its reverse (5172412), we get a palindrome (26599562).

The spelling of 21427150 in words is "twenty-one million, four hundred twenty-seven thousand, one hundred fifty".