20400213401003 has 4 divisors (see below), whose sum is σ = 20400225091080. Its totient is φ = 20400201710928.

The previous prime is 20400213400981. The next prime is 20400213401093. The reversal of 20400213401003 is 30010431200402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20400213401003 - 2⁸ = 20400213400747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400213401093) 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, 2642513 + ... + 6912546.

It is an arithmetic number, because the mean of its divisors is an integer number (5100056272770).

Almost surely, 2^{20400213401003} is an apocalyptic number.

20400213401003 is a deficient number, since it is larger than the sum of its proper divisors (11690077).

20400213401003 is an equidigital number, since it uses as much as digits as its factorization.

20400213401003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11690076.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20400213401003 its reverse (30010431200402), we get a palindrome (50410644601405).

The spelling of 20400213401003 in words is "twenty trillion, four hundred billion, two hundred thirteen million, four hundred one thousand, three".