21322246402 has 4 divisors (see below), whose sum is σ = 31983369606. Its totient is φ = 10661123200.

The previous prime is 21322246357. The next prime is 21322246411. The reversal of 21322246402 is 20464222312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11197660761 + 10124585641 = 105819^2 + 100621^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330561599 + ... + 5330561602.

Almost surely, 2^21322246402 is an apocalyptic number.

21322246402 is a deficient number, since it is larger than the sum of its proper divisors (10661123204).

21322246402 is a wasteful number, since it uses less digits than its factorization.

21322246402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661123203.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21322246402 its reverse (20464222312), we get a palindrome (41786468714).

The spelling of 21322246402 in words is "twenty-one billion, three hundred twenty-two million, two hundred forty-six thousand, four hundred two".