20376945 has 12 divisors (see below), whose sum is σ = 35320116. Its totient is φ = 10867680.

The previous prime is 20376907. The next prime is 20376947. The reversal of 20376945 is 54967302.

It can be written as a sum of positive squares in 2 ways, for example, as 3038049 + 17338896 = 1743^2 + 4164^2 .

It is not a de Polignac number, because 20376945 - 2¹⁰ = 20375921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20376947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226366 + ... + 226455.

It is an arithmetic number, because the mean of its divisors is an integer number (2943343).

Almost surely, 2^20376945 is an apocalyptic number.

It is an amenable number.

20376945 is a deficient number, since it is larger than the sum of its proper divisors (14943171).

20376945 is a wasteful number, since it uses less digits than its factorization.

20376945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452832 (or 452829 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20376945 is about 4514.0829633493. The cubic root of 20376945 is about 273.1364692246.

It can be divided in two parts, 20376 and 945, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 20376945 in words is "twenty million, three hundred seventy-six thousand, nine hundred forty-five".