20534684925863 has 4 divisors (see below), whose sum is σ = 21427497313968. Its totient is φ = 19641872537760.

The previous prime is 20534684925809. The next prime is 20534684925919. The reversal of 20534684925863 is 36852948643502.

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 20534684925863 - 2¹² = 20534684921767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20534684925863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534684985863) 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, 446406194018 + ... + 446406194063.

It is an arithmetic number, because the mean of its divisors is an integer number (5356874328492).

Almost surely, 2^{20534684925863} is an apocalyptic number.

20534684925863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20534684925863 is a deficient number, since it is larger than the sum of its proper divisors (892812388105).

20534684925863 is an equidigital number, since it uses as much as digits as its factorization.

20534684925863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892812388104.

The product of its (nonzero) digits is 298598400, while the sum is 65.

The spelling of 20534684925863 in words is "twenty trillion, five hundred thirty-four billion, six hundred eighty-four million, nine hundred twenty-five thousand, eight hundred sixty-three".