20400410410403 has 4 divisors (see below), whose sum is σ = 20406174870120. Its totient is φ = 20394645950688.

The previous prime is 20400410410337. The next prime is 20400410410409. The reversal of 20400410410403 is 30401401400402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20400410410403 - 2¹² = 20400410406307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400410410409) 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, 2882224550 + ... + 2882231627.

It is an arithmetic number, because the mean of its divisors is an integer number (5101543717530).

Almost surely, 2^{20400410410403} is an apocalyptic number.

20400410410403 is a deficient number, since it is larger than the sum of its proper divisors (5764459717).

20400410410403 is an equidigital number, since it uses as much as digits as its factorization.

20400410410403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764459716.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20400410410403 its reverse (30401401400402), we get a palindrome (50801811810805).

The spelling of 20400410410403 in words is "twenty trillion, four hundred billion, four hundred ten million, four hundred ten thousand, four hundred three".