220023146605 has 4 divisors (see below), whose sum is σ = 264027775932. Its totient is φ = 176018517280.

The previous prime is 220023146557. The next prime is 220023146627. The reversal of 220023146605 is 506641320022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506641320022 = 2 ⋅253320660011.

It can be written as a sum of positive squares in 2 ways, for example, as 37699270569 + 182323876036 = 194163^2 + 426994^2 .

It is not a de Polignac number, because 220023146605 - 2⁷ = 220023146477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22002314656 + ... + 22002314665.

It is an arithmetic number, because the mean of its divisors is an integer number (66006943983).

Almost surely, 2^220023146605 is an apocalyptic number.

It is an amenable number.

220023146605 is a deficient number, since it is larger than the sum of its proper divisors (44004629327).

220023146605 is an equidigital number, since it uses as much as digits as its factorization.

220023146605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44004629326.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 220023146605 its reverse (506641320022), we get a palindrome (726664466627).

The spelling of 220023146605 in words is "two hundred twenty billion, twenty-three million, one hundred forty-six thousand, six hundred five".