21320200330402 has 8 divisors (see below), whose sum is σ = 33083069478300. Its totient is φ = 10292510504304.

The previous prime is 21320200330339. The next prime is 21320200330409. The reversal of 21320200330402 is 20403300202312.

It can be written as a sum of positive squares in 2 ways, for example, as 21308277655921 + 11922674481 = 4616089^2 + 109191^2 .

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 (21320200330409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183794830377 + ... + 183794830492.

Almost surely, 2^{21320200330402} is an apocalyptic number.

21320200330402 is a deficient number, since it is larger than the sum of its proper divisors (11762869147898).

21320200330402 is a wasteful number, since it uses less digits than its factorization.

21320200330402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367589660900.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21320200330402 its reverse (20403300202312), we get a palindrome (41723500532714).

The spelling of 21320200330402 in words is "twenty-one trillion, three hundred twenty billion, two hundred million, three hundred thirty thousand, four hundred two".