20544550 has 24 divisors (see below), whose sum is σ = 41153616. Its totient is φ = 7585440.

The previous prime is 20544547. The next prime is 20544553. The reversal of 20544550 is 5544502.

It is an interprime number because it is at equal distance from previous prime (20544547) and next prime (20544553).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544553) 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, 15154 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (1714734).

Almost surely, 2^20544550 is an apocalyptic number.

20544550 is an abundant number, since it is smaller than the sum of its proper divisors (20609066).

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

20544550 is a wasteful number, since it uses less digits than its factorization.

20544550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31632 (or 31627 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20544550 is about 4532.6096236054. The cubic root of 20544550 is about 273.8832951762.

The spelling of 20544550 in words is "twenty million, five hundred forty-four thousand, five hundred fifty".