20424333401 has 4 divisors (see below), whose sum is σ = 20537175204. Its totient is φ = 20311491600.

The previous prime is 20424333383. The next prime is 20424333427. The reversal of 20424333401 is 10433342402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4199688025 + 16224645376 = 64805^2 + 127376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424333401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424333491) 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, 56420630 + ... + 56420991.

It is an arithmetic number, because the mean of its divisors is an integer number (5134293801).

Almost surely, 2^20424333401 is an apocalyptic number.

It is an amenable number.

20424333401 is a deficient number, since it is larger than the sum of its proper divisors (112841803).

20424333401 is a wasteful number, since it uses less digits than its factorization.

20424333401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112841802.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 20424333401 its reverse (10433342402), we get a palindrome (30857675803).

Subtracting from 20424333401 its reverse (10433342402), we obtain a palindrome (9990990999).

The spelling of 20424333401 in words is "twenty billion, four hundred twenty-four million, three hundred thirty-three thousand, four hundred one".