21468693 has 4 divisors (see below), whose sum is σ = 28624928. Its totient is φ = 14312460.

The previous prime is 21468691. The next prime is 21468701. The reversal of 21468693 is 39686412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21468693 - 2¹ = 21468691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3578113 + ... + 3578118.

It is an arithmetic number, because the mean of its divisors is an integer number (7156232).

Almost surely, 2^21468693 is an apocalyptic number.

It is an amenable number.

21468693 is a deficient number, since it is larger than the sum of its proper divisors (7156235).

21468693 is an equidigital number, since it uses as much as digits as its factorization.

21468693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156234.

The product of its digits is 62208, while the sum is 39.

The square root of 21468693 is about 4633.4320972687. The cubic root of 21468693 is about 277.9298556703.

The spelling of 21468693 in words is "twenty-one million, four hundred sixty-eight thousand, six hundred ninety-three".