20245650 has 48 divisors (see below), whose sum is σ = 50943168. Its totient is φ = 5320000.

The previous prime is 20245649. The next prime is 20245651. The reversal of 20245650 is 5654202.

It is an interprime number because it is at equal distance from previous prime (20245649) and next prime (20245651).

It is a self number, because there is not a number n which added to its sum of digits gives 20245650.

It is not an unprimeable number, because it can be changed into a prime (20245651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9700 + ... + 11600.

It is an arithmetic number, because the mean of its divisors is an integer number (1061316).

Almost surely, 2^20245650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20245650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25471584).

20245650 is an abundant number, since it is smaller than the sum of its proper divisors (30697518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20245650 is a wasteful number, since it uses less digits than its factorization.

20245650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20245650 is about 4499.5166407071. The cubic root of 20245650 is about 272.5485703059.

Adding to 20245650 its reverse (5654202), we get a palindrome (25899852).

It can be divided in two parts, 20 and 245650, that multiplied together give a cube (4913000 = 170³).

The spelling of 20245650 in words is "twenty million, two hundred forty-five thousand, six hundred fifty".