20459895623 has 8 divisors (see below), whose sum is σ = 21337626240. Its totient is φ = 19595773440.

The previous prime is 20459895611. The next prime is 20459895629. The reversal of 20459895623 is 32659895402.

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

It is a cyclic number.

It is not a de Polignac number, because 20459895623 - 2²⁶ = 20392786759 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 (20459895629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3399038 + ... + 3405051.

It is an arithmetic number, because the mean of its divisors is an integer number (2667203280).

Almost surely, 2^20459895623 is an apocalyptic number.

20459895623 is a deficient number, since it is larger than the sum of its proper divisors (877730617).

20459895623 is an equidigital number, since it uses as much as digits as its factorization.

20459895623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804217.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 20459895623 in words is "twenty billion, four hundred fifty-nine million, eight hundred ninety-five thousand, six hundred twenty-three".