20853799045 has 32 divisors (see below), whose sum is σ = 27612555264. Its totient is φ = 15066163200.

The previous prime is 20853799027. The next prime is 20853799063. The reversal of 20853799045 is 54099735802.

It is an interprime number because it is at equal distance from previous prime (20853799027) and next prime (20853799063).

It is not a de Polignac number, because 20853799045 - 2⁹ = 20853798533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20853798983 and 20853799001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74829 + ... + 217501.

It is an arithmetic number, because the mean of its divisors is an integer number (862892352).

Almost surely, 2^20853799045 is an apocalyptic number.

It is an amenable number.

20853799045 is a deficient number, since it is larger than the sum of its proper divisors (6758756219).

20853799045 is a wasteful number, since it uses less digits than its factorization.

20853799045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142773.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 20853799045 in words is "twenty billion, eight hundred fifty-three million, seven hundred ninety-nine thousand, forty-five".