18900737 has 2 divisors, whose sum is σ = 18900738. Its totient is φ = 18900736.

The previous prime is 18900703. The next prime is 18900781. The reversal of 18900737 is 73700981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10233601 + 8667136 = 3199^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 18900737 - 2¹⁸ = 18638593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18900697 and 18900706.

It is not a weakly prime, because it can be changed into another prime (18900797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9450368 + 9450369.

It is an arithmetic number, because the mean of its divisors is an integer number (9450369).

Almost surely, 2^18900737 is an apocalyptic number.

It is an amenable number.

18900737 is a deficient number, since it is larger than the sum of its proper divisors (1).

18900737 is an equidigital number, since it uses as much as digits as its factorization.

18900737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 18900737 is about 4347.4977860834. The cubic root of 18900737 is about 266.3746628336.

The spelling of 18900737 in words is "eighteen million, nine hundred thousand, seven hundred thirty-seven".