20144646247256 has 32 divisors (see below), whose sum is σ = 37954193249280. Its totient is φ = 10023538039200.

The previous prime is 20144646247163. The next prime is 20144646247261. The reversal of 20144646247256 is 65274264644102.

It is a junction number, because it is equal to n+sod(n) for n = 20144646247198 and 20144646247207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15637565 + ... + 16876691.

It is an arithmetic number, because the mean of its divisors is an integer number (1186068539040).

Almost surely, 2^{20144646247256} is an apocalyptic number.

It is an amenable number.

20144646247256 is a deficient number, since it is larger than the sum of its proper divisors (17809547002024).

20144646247256 is a wasteful number, since it uses less digits than its factorization.

20144646247256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248975 (or 1248971 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 53.

The spelling of 20144646247256 in words is "twenty trillion, one hundred forty-four billion, six hundred forty-six million, two hundred forty-seven thousand, two hundred fifty-six".