21341654 has 8 divisors (see below), whose sum is σ = 33404400. Its totient is φ = 10206856.

The previous prime is 21341629. The next prime is 21341659. The reversal of 21341654 is 45614312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341659) 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 3 ways as a sum of consecutive naturals, for example, 231929 + ... + 232020.

It is an arithmetic number, because the mean of its divisors is an integer number (4175550).

Almost surely, 2^21341654 is an apocalyptic number.

21341654 is a deficient number, since it is larger than the sum of its proper divisors (12062746).

21341654 is a wasteful number, since it uses less digits than its factorization.

21341654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463974.

The product of its digits is 2880, while the sum is 26.

The square root of 21341654 is about 4619.7028042938. The cubic root of 21341654 is about 277.3805627287.

Adding to 21341654 its reverse (45614312), we get a palindrome (66955966).

The spelling of 21341654 in words is "twenty-one million, three hundred forty-one thousand, six hundred fifty-four".