20181235207 has 18 divisors (see below), whose sum is σ = 24541241928. Its totient is φ = 16546084632.

The previous prime is 20181235183. The next prime is 20181235213. The reversal of 20181235207 is 70253218102.

It is not a de Polignac number, because 20181235207 - 2⁷ = 20181235079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20181235307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 363363 + ... + 415204.

Almost surely, 2^20181235207 is an apocalyptic number.

20181235207 is a deficient number, since it is larger than the sum of its proper divisors (4360006721).

20181235207 is an equidigital number, since it uses as much as digits as its factorization.

20181235207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778627 (or 778597 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 20181235207 in words is "twenty billion, one hundred eighty-one million, two hundred thirty-five thousand, two hundred seven".