20187552793 has 2 divisors, whose sum is σ = 20187552794. Its totient is φ = 20187552792.

The previous prime is 20187552757. The next prime is 20187552799. The reversal of 20187552793 is 39725578102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10142101264 + 10045451529 = 100708^2 + 100227^2 .

It is a cyclic number.

It is not a de Polignac number, because 20187552793 - 2¹⁷ = 20187421721 is a prime.

It is not a weakly prime, because it can be changed into another prime (20187552799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10093776396 + 10093776397.

It is an arithmetic number, because the mean of its divisors is an integer number (10093776397).

Almost surely, 2^20187552793 is an apocalyptic number.

It is an amenable number.

20187552793 is a deficient number, since it is larger than the sum of its proper divisors (1).

20187552793 is an equidigital number, since it uses as much as digits as its factorization.

20187552793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 20187552793 in words is "twenty billion, one hundred eighty-seven million, five hundred fifty-two thousand, seven hundred ninety-three".