21469601 has 8 divisors (see below), whose sum is σ = 22643520. Its totient is φ = 20300112.

The previous prime is 21469579. The next prime is 21469607. The reversal of 21469601 is 10696412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21469601 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (21469607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14951 + ... + 16323.

It is an arithmetic number, because the mean of its divisors is an integer number (2830440).

Almost surely, 2^21469601 is an apocalyptic number.

It is an amenable number.

21469601 is a deficient number, since it is larger than the sum of its proper divisors (1173919).

21469601 is a wasteful number, since it uses less digits than its factorization.

21469601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 21469601 is about 4633.5300797556. The cubic root of 21469601 is about 277.9337738836.

The spelling of 21469601 in words is "twenty-one million, four hundred sixty-nine thousand, six hundred one".