20400608222401 has 16 divisors (see below), whose sum is σ = 22537216016640. Its totient is φ = 18311007761280.

The previous prime is 20400608222383. The next prime is 20400608222411. The reversal of 20400608222401 is 10422280600402.

It is a cyclic number.

It is not a de Polignac number, because 20400608222401 - 2¹¹ = 20400608220353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400608222411) 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 15 ways as a sum of consecutive naturals, for example, 120860475 + ... + 121029151.

It is an arithmetic number, because the mean of its divisors is an integer number (1408576001040).

Almost surely, 2^{20400608222401} is an apocalyptic number.

It is an amenable number.

20400608222401 is a deficient number, since it is larger than the sum of its proper divisors (2136607794239).

20400608222401 is a wasteful number, since it uses less digits than its factorization.

20400608222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307944.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 20400608222401 its reverse (10422280600402), we get a palindrome (30822888822803).

The spelling of 20400608222401 in words is "twenty trillion, four hundred billion, six hundred eight million, two hundred twenty-two thousand, four hundred one".