20250865 has 16 divisors (see below), whose sum is σ = 26020800. Its totient is φ = 15083712.

The previous prime is 20250863. The next prime is 20250869. The reversal of 20250865 is 56805202.

It is a cyclic number.

It is not a de Polignac number, because 20250865 - 2¹ = 20250863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20250863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3799 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (1626300).

Almost surely, 2^20250865 is an apocalyptic number.

It is an amenable number.

20250865 is a deficient number, since it is larger than the sum of its proper divisors (5769935).

20250865 is a wasteful number, since it uses less digits than its factorization.

20250865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20250865 is about 4500.0961100848. The cubic root of 20250865 is about 272.5719698802.

It can be divided in two parts, 20250 and 865, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20250865 in words is "twenty million, two hundred fifty thousand, eight hundred sixty-five".