20882450465 has 4 divisors (see below), whose sum is σ = 25058940564. Its totient is φ = 16705960368.

The previous prime is 20882450453. The next prime is 20882450509. The reversal of 20882450465 is 56405428802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11584862689 + 9297587776 = 107633^2 + 96424^2 .

It is a cyclic number.

It is not a de Polignac number, because 20882450465 - 2⁶ = 20882450401 is a prime.

It is a Duffinian 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, 2088245042 + ... + 2088245051.

It is an arithmetic number, because the mean of its divisors is an integer number (6264735141).

Almost surely, 2^20882450465 is an apocalyptic number.

It is an amenable number.

20882450465 is a deficient number, since it is larger than the sum of its proper divisors (4176490099).

20882450465 is an equidigital number, since it uses as much as digits as its factorization.

20882450465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176490098.

The product of its (nonzero) digits is 614400, while the sum is 44.

The spelling of 20882450465 in words is "twenty billion, eight hundred eighty-two million, four hundred fifty thousand, four hundred sixty-five".