20418360737 has 2 divisors, whose sum is σ = 20418360738. Its totient is φ = 20418360736.

The previous prime is 20418360701. The next prime is 20418360817. The reversal of 20418360737 is 73706381402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19447975936 + 970384801 = 139456^2 + 31151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20418360737 - 2¹⁸ = 20418098593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20418360694 and 20418360703.

It is not a weakly prime, because it can be changed into another prime (20418360037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209180368 + 10209180369.

It is an arithmetic number, because the mean of its divisors is an integer number (10209180369).

Almost surely, 2^20418360737 is an apocalyptic number.

It is an amenable number.

20418360737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20418360737 is an equidigital number, since it uses as much as digits as its factorization.

20418360737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 20418360737 in words is "twenty billion, four hundred eighteen million, three hundred sixty thousand, seven hundred thirty-seven".