21241420346 has 8 divisors (see below), whose sum is σ = 32171471904. Its totient is φ = 10517596380.

The previous prime is 21241420331. The next prime is 21241420397. The reversal of 21241420346 is 64302414212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51556640 + ... + 51557051.

It is an arithmetic number, because the mean of its divisors is an integer number (4021433988).

Almost surely, 2^21241420346 is an apocalyptic number.

21241420346 is a deficient number, since it is larger than the sum of its proper divisors (10930051558).

21241420346 is a wasteful number, since it uses less digits than its factorization.

21241420346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103113796.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21241420346 its reverse (64302414212), we get a palindrome (85543834558).

The spelling of 21241420346 in words is "twenty-one billion, two hundred forty-one million, four hundred twenty thousand, three hundred forty-six".