20384642237 has 2 divisors, whose sum is σ = 20384642238. Its totient is φ = 20384642236.

The previous prime is 20384642231. The next prime is 20384642261. The reversal of 20384642237 is 73224648302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20365858681 + 18783556 = 142709^2 + 4334^2 .

It is a cyclic number.

It is not a de Polignac number, because 20384642237 - 2¹⁴ = 20384625853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20384642194 and 20384642203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20384642231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192321118 + 10192321119.

It is an arithmetic number, because the mean of its divisors is an integer number (10192321119).

Almost surely, 2^20384642237 is an apocalyptic number.

It is an amenable number.

20384642237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20384642237 is an equidigital number, since it uses as much as digits as its factorization.

20384642237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 20384642237 in words is "twenty billion, three hundred eighty-four million, six hundred forty-two thousand, two hundred thirty-seven".