21338762 has 4 divisors (see below), whose sum is σ = 32008146. Its totient is φ = 10669380.

The previous prime is 21338761. The next prime is 21338777. The reversal of 21338762 is 26783312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21058921 + 279841 = 4589^2 + 529^2 .

It is not an unprimeable number, because it can be changed into a prime (21338761) 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 as a sum of consecutive naturals, namely, 5334689 + ... + 5334692.

Almost surely, 2^21338762 is an apocalyptic number.

21338762 is a deficient number, since it is larger than the sum of its proper divisors (10669384).

21338762 is a wasteful number, since it uses less digits than its factorization.

21338762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669383.

The product of its digits is 12096, while the sum is 32.

The square root of 21338762 is about 4619.3897865411. The cubic root of 21338762 is about 277.3680329153.

The spelling of 21338762 in words is "twenty-one million, three hundred thirty-eight thousand, seven hundred sixty-two".