20431530237 has 8 divisors (see below), whose sum is σ = 27264067936. Its totient is φ = 13610006352.

The previous prime is 20431530227. The next prime is 20431530239. The reversal of 20431530237 is 73203513402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20431530237 - 2⁶ = 20431530173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431530239) 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 7 ways as a sum of consecutive naturals, for example, 2749123 + ... + 2756544.

It is an arithmetic number, because the mean of its divisors is an integer number (3408008492).

Almost surely, 2^20431530237 is an apocalyptic number.

It is an amenable number.

20431530237 is a deficient number, since it is larger than the sum of its proper divisors (6832537699).

20431530237 is a wasteful number, since it uses less digits than its factorization.

20431530237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506907.

The product of its (nonzero) digits is 15120, while the sum is 30.

The spelling of 20431530237 in words is "twenty billion, four hundred thirty-one million, five hundred thirty thousand, two hundred thirty-seven".