20342440401 has 16 divisors (see below), whose sum is σ = 27490801728. Its totient is φ = 13378824000.

The previous prime is 20342440399. The next prime is 20342440429. The reversal of 20342440401 is 10404424302.

It is a happy number.

It is not a de Polignac number, because 20342440401 - 2¹ = 20342440399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20342440441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37255 + ... + 205116.

It is an arithmetic number, because the mean of its divisors is an integer number (1718175108).

Almost surely, 2^20342440401 is an apocalyptic number.

It is an amenable number.

20342440401 is a deficient number, since it is larger than the sum of its proper divisors (7148361327).

20342440401 is a wasteful number, since it uses less digits than its factorization.

20342440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242752.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20342440401 its reverse (10404424302), we get a palindrome (30746864703).

The spelling of 20342440401 in words is "twenty billion, three hundred forty-two million, four hundred forty thousand, four hundred one".