21368762 has 8 divisors (see below), whose sum is σ = 33938676. Its totient is φ = 10055872.

The previous prime is 21368761. The next prime is 21368777. The reversal of 21368762 is 26786312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20894041 + 474721 = 4571^2 + 689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21368761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314213 + ... + 314280.

Almost surely, 2^21368762 is an apocalyptic number.

21368762 is a deficient number, since it is larger than the sum of its proper divisors (12569914).

21368762 is a wasteful number, since it uses less digits than its factorization.

21368762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628512.

The product of its digits is 24192, while the sum is 35.

The square root of 21368762 is about 4622.6358281829. The cubic root of 21368762 is about 277.4979552375.

The spelling of 21368762 in words is "twenty-one million, three hundred sixty-eight thousand, seven hundred sixty-two".