20863903237 has 2 divisors, whose sum is σ = 20863903238. Its totient is φ = 20863903236.

The previous prime is 20863903219. The next prime is 20863903243. The reversal of 20863903237 is 73230936802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16643322081 + 4220581156 = 129009^2 + 64966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20863903237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20863903193 and 20863903202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20863903297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431951618 + 10431951619.

It is an arithmetic number, because the mean of its divisors is an integer number (10431951619).

Almost surely, 2^20863903237 is an apocalyptic number.

It is an amenable number.

20863903237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863903237 is an equidigital number, since it uses as much as digits as its factorization.

20863903237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 20863903237 in words is "twenty billion, eight hundred sixty-three million, nine hundred three thousand, two hundred thirty-seven".