20400213020093 has 2 divisors, whose sum is σ = 20400213020094. Its totient is φ = 20400213020092.

The previous prime is 20400213020009. The next prime is 20400213020111. The reversal of 20400213020093 is 39002031200402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14635498455769 + 5764714564324 = 3825637^2 + 2400982^2 .

It is a cyclic number.

It is not a de Polignac number, because 20400213020093 - 2¹² = 20400213015997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20400213020393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200106510046 + 10200106510047.

It is an arithmetic number, because the mean of its divisors is an integer number (10200106510047).

Almost surely, 2^{20400213020093} is an apocalyptic number.

It is an amenable number.

20400213020093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400213020093 is an equidigital number, since it uses as much as digits as its factorization.

20400213020093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20400213020093 its reverse (39002031200402), we get a palindrome (59402244220495).

The spelling of 20400213020093 in words is "twenty trillion, four hundred billion, two hundred thirteen million, twenty thousand, ninety-three".