21324413402 has 8 divisors (see below), whose sum is σ = 32032912512. Its totient is φ = 10646775900.

The previous prime is 21324413401. The next prime is 21324413417. The reversal of 21324413402 is 20431442312.

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

It is not an unprimeable number, because it can be changed into a prime (21324413401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7713674 + ... + 7716437.

It is an arithmetic number, because the mean of its divisors is an integer number (4004114064).

Almost surely, 2^21324413402 is an apocalyptic number.

21324413402 is a deficient number, since it is larger than the sum of its proper divisors (10708499110).

21324413402 is a wasteful number, since it uses less digits than its factorization.

21324413402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15430804.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21324413402 its reverse (20431442312), we get a palindrome (41755855714).

The spelling of 21324413402 in words is "twenty-one billion, three hundred twenty-four million, four hundred thirteen thousand, four hundred two".