21338462 has 16 divisors (see below), whose sum is σ = 32555520. Its totient is φ = 10488192.

The previous prime is 21338441. The next prime is 21338467. The reversal of 21338462 is 26483312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338467) 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 7 ways as a sum of consecutive naturals, for example, 55523 + ... + 55905.

It is an arithmetic number, because the mean of its divisors is an integer number (2034720).

Almost surely, 2^21338462 is an apocalyptic number.

21338462 is a deficient number, since it is larger than the sum of its proper divisors (11217058).

21338462 is a wasteful number, since it uses less digits than its factorization.

21338462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787.

The product of its digits is 6912, while the sum is 29.

The square root of 21338462 is about 4619.3573146056. The cubic root of 21338462 is about 277.3667330773.

The spelling of 21338462 in words is "twenty-one million, three hundred thirty-eight thousand, four hundred sixty-two".