20465243263655 has 4 divisors (see below), whose sum is σ = 24558291916392. Its totient is φ = 16372194610920.

The previous prime is 20465243263571. The next prime is 20465243263657. The reversal of 20465243263655 is 55636234256402.

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

It is not a de Polignac number, because 20465243263655 - 2⁴⁴ = 2873057219239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20465243263597 and 20465243263606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465243263657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046524326361 + ... + 2046524326370.

It is an arithmetic number, because the mean of its divisors is an integer number (6139572979098).

Almost surely, 2^{20465243263655} is an apocalyptic number.

20465243263655 is a deficient number, since it is larger than the sum of its proper divisors (4093048652737).

20465243263655 is an equidigital number, since it uses as much as digits as its factorization.

20465243263655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093048652736.

The product of its (nonzero) digits is 31104000, while the sum is 53.

The spelling of 20465243263655 in words is "twenty trillion, four hundred sixty-five billion, two hundred forty-three million, two hundred sixty-three thousand, six hundred fifty-five".