20201099983637 has 2 divisors, whose sum is σ = 20201099983638. Its totient is φ = 20201099983636.

The previous prime is 20201099983601. The next prime is 20201099983657. The reversal of 20201099983637 is 73638999010202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18486783739876 + 1714316243761 = 4299626^2 + 1309319^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201099983637 - 2¹⁶ = 20201099918101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201099983657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100549991818 + 10100549991819.

It is an arithmetic number, because the mean of its divisors is an integer number (10100549991819).

Almost surely, 2^{20201099983637} is an apocalyptic number.

It is an amenable number.

20201099983637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201099983637 is an equidigital number, since it uses as much as digits as its factorization.

20201099983637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 20201099983637 in words is "twenty trillion, two hundred one billion, ninety-nine million, nine hundred eighty-three thousand, six hundred thirty-seven".