20218488023 has 4 divisors (see below), whose sum is σ = 20250030768. Its totient is φ = 20186945280.

The previous prime is 20218488019. The next prime is 20218488041. The reversal of 20218488023 is 32088481202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32088481202 = 2 ⋅16044240601.

It is a cyclic number.

It is not a de Polignac number, because 20218488023 - 2² = 20218488019 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 (20218488053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15770411 + ... + 15771692.

It is an arithmetic number, because the mean of its divisors is an integer number (5062507692).

Almost surely, 2^20218488023 is an apocalyptic number.

20218488023 is a deficient number, since it is larger than the sum of its proper divisors (31542745).

20218488023 is an equidigital number, since it uses as much as digits as its factorization.

20218488023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31542744.

The product of its (nonzero) digits is 49152, while the sum is 38.

The spelling of 20218488023 in words is "twenty billion, two hundred eighteen million, four hundred eighty-eight thousand, twenty-three".