21032402401 has 8 divisors (see below), whose sum is σ = 21074122080. Its totient is φ = 20990716032.

The previous prime is 21032402399. The next prime is 21032402407. The reversal of 21032402401 is 10420423012.

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 21032402401 - 2¹ = 21032402399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21032402407) 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 7 ways as a sum of consecutive naturals, for example, 1525105 + ... + 1538833.

It is an arithmetic number, because the mean of its divisors is an integer number (2634265260).

Almost surely, 2^21032402401 is an apocalyptic number.

It is an amenable number.

21032402401 is a deficient number, since it is larger than the sum of its proper divisors (41719679).

21032402401 is a wasteful number, since it uses less digits than its factorization.

21032402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16655.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21032402401 its reverse (10420423012), we get a palindrome (31452825413).

The spelling of 21032402401 in words is "twenty-one billion, thirty-two million, four hundred two thousand, four hundred one".