20093436397 has 2 divisors, whose sum is σ = 20093436398. Its totient is φ = 20093436396.

The previous prime is 20093436361. The next prime is 20093436427. The reversal of 20093436397 is 79363439002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18079760521 + 2013675876 = 134461^2 + 44874^2 .

It is a cyclic number.

It is not a de Polignac number, because 20093436397 - 2¹⁹ = 20092912109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20093436197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10046718198 + 10046718199.

It is an arithmetic number, because the mean of its divisors is an integer number (10046718199).

Almost surely, 2^20093436397 is an apocalyptic number.

It is an amenable number.

20093436397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20093436397 is an equidigital number, since it uses as much as digits as its factorization.

20093436397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 46.

It can be divided in two parts, 20093 and 436397, that added together give a triangular number (456490 = T₉₅₅).

The spelling of 20093436397 in words is "twenty billion, ninety-three million, four hundred thirty-six thousand, three hundred ninety-seven".