21348410 has 8 divisors (see below), whose sum is σ = 38427156. Its totient is φ = 8539360.

The previous prime is 21348409. The next prime is 21348421. The reversal of 21348410 is 1484312.

It can be written as a sum of positive squares in 2 ways, for example, as 21187609 + 160801 = 4603^2 + 401^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067411 + ... + 1067430.

Almost surely, 2^21348410 is an apocalyptic number.

21348410 is a deficient number, since it is larger than the sum of its proper divisors (17078746).

21348410 is a wasteful number, since it uses less digits than its factorization.

21348410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134848.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21348410 is about 4620.4339623027. The cubic root of 21348410 is about 277.4098292103.

The spelling of 21348410 in words is "twenty-one million, three hundred forty-eight thousand, four hundred ten".