21442430401 has 8 divisors (see below), whose sum is σ = 24515547840. Its totient is φ = 18371791248.

The previous prime is 21442430389. The next prime is 21442430413. The reversal of 21442430401 is 10403424412.

It is an interprime number because it is at equal distance from previous prime (21442430389) and next prime (21442430413).

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 21442430401 - 2⁵ = 21442430369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442430461) 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, 600991 + ... + 635668.

It is an arithmetic number, because the mean of its divisors is an integer number (3064443480).

Almost surely, 2^21442430401 is an apocalyptic number.

It is an amenable number.

21442430401 is a deficient number, since it is larger than the sum of its proper divisors (3073117439).

21442430401 is a wasteful number, since it uses less digits than its factorization.

21442430401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239143.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442430401 its reverse (10403424412), we get a palindrome (31845854813).

The spelling of 21442430401 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty thousand, four hundred one".