21433310401 has 8 divisors (see below), whose sum is σ = 22186218600. Its totient is φ = 20681324160.

The previous prime is 21433310333. The next prime is 21433310417. The reversal of 21433310401 is 10401333412.

It can be written as a sum of positive squares in 4 ways, for example, as 11204010801 + 10229299600 = 105849^2 + 101140^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21433310401 - 2¹⁵ = 21433277633 is a prime.

It is a super-2 number, since 2×21433310401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433310461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183010 + ... + 276331.

It is an arithmetic number, because the mean of its divisors is an integer number (2773277325).

Almost surely, 2^21433310401 is an apocalyptic number.

It is an amenable number.

21433310401 is a deficient number, since it is larger than the sum of its proper divisors (752908199).

21433310401 is a wasteful number, since it uses less digits than its factorization.

21433310401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460979.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21433310401 its reverse (10401333412), we get a palindrome (31834643813).

The spelling of 21433310401 in words is "twenty-one billion, four hundred thirty-three million, three hundred ten thousand, four hundred one".