20678383237 has 2 divisors, whose sum is σ = 20678383238. Its totient is φ = 20678383236.

The previous prime is 20678383223. The next prime is 20678383277. The reversal of 20678383237 is 73238387602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12072295876 + 8606087361 = 109874^2 + 92769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20678383237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20678383217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10339191618 + 10339191619.

It is an arithmetic number, because the mean of its divisors is an integer number (10339191619).

Almost surely, 2^20678383237 is an apocalyptic number.

It is an amenable number.

20678383237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20678383237 is an equidigital number, since it uses as much as digits as its factorization.

20678383237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 20678383237 in words is "twenty billion, six hundred seventy-eight million, three hundred eighty-three thousand, two hundred thirty-seven".