20246647331 has 4 divisors (see below), whose sum is σ = 20455375752. Its totient is φ = 20037918912.

The previous prime is 20246647319. The next prime is 20246647363. The reversal of 20246647331 is 13374664202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20246647331 - 2¹⁰ = 20246646307 is a prime.

It is a super-2 number, since 2×20246647331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20246647231) 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 3 ways as a sum of consecutive naturals, for example, 104364065 + ... + 104364258.

It is an arithmetic number, because the mean of its divisors is an integer number (5113843938).

Almost surely, 2^20246647331 is an apocalyptic number.

20246647331 is a deficient number, since it is larger than the sum of its proper divisors (208728421).

20246647331 is an equidigital number, since it uses as much as digits as its factorization.

20246647331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208728420.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 20246647331 in words is "twenty billion, two hundred forty-six million, six hundred forty-seven thousand, three hundred thirty-one".