20245550 has 24 divisors (see below), whose sum is σ = 40554696. Its totient is φ = 7475040.

The previous prime is 20245541. The next prime is 20245553. The reversal of 20245550 is 5554202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14924 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (1689779).

Almost surely, 2^20245550 is an apocalyptic number.

20245550 is an abundant number, since it is smaller than the sum of its proper divisors (20309146).

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

20245550 is a wasteful number, since it uses less digits than its factorization.

20245550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31172 (or 31167 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20245550 is about 4499.5055283886. The cubic root of 20245550 is about 272.5481215692.

Adding to 20245550 its reverse (5554202), we get a palindrome (25799752).

It can be divided in two parts, 202455 and 50, that multiplied together give a triangular number (10122750 = T₄₄₉₉).

The spelling of 20245550 in words is "twenty million, two hundred forty-five thousand, five hundred fifty".