21376468 has 6 divisors (see below), whose sum is σ = 37408826. Its totient is φ = 10688232.

The previous prime is 21376447. The next prime is 21376469. The reversal of 21376468 is 86467312.

It can be written as a sum of positive squares in only one way, i.e., 14884164 + 6492304 = 3858^2 + 2548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2672055 + ... + 2672062.

Almost surely, 2^21376468 is an apocalyptic number.

It is an amenable number.

21376468 is a deficient number, since it is larger than the sum of its proper divisors (16032358).

21376468 is a wasteful number, since it uses less digits than its factorization.

21376468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344121 (or 5344119 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 21376468 is about 4623.4692601984. The cubic root of 21376468 is about 277.5313083200.

The spelling of 21376468 in words is "twenty-one million, three hundred seventy-six thousand, four hundred sixty-eight".