20260845 has 54 divisors (see below), whose sum is σ = 39244842. Its totient is φ = 9662400.

The previous prime is 20260837. The next prime is 20260873. The reversal of 20260845 is 54806202.

It can be written as a sum of positive squares in 3 ways, for example, as 1572516 + 18688329 = 1254^2 + 4323^2 .

It is not a de Polignac number, because 20260845 - 2³ = 20260837 is a prime.

It is a super-2 number, since 2×20260845² = 821003680228050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 332115 + ... + 332175.

Almost surely, 2^20260845 is an apocalyptic number.

It is an amenable number.

20260845 is a deficient number, since it is larger than the sum of its proper divisors (18983997).

20260845 is a wasteful number, since it uses less digits than its factorization.

20260845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20260845 is about 4501.2048387071. The cubic root of 20260845 is about 272.6167386924.

The spelling of 20260845 in words is "twenty million, two hundred sixty thousand, eight hundred forty-five".