20541550 has 24 divisors (see below), whose sum is σ = 38359152. Its totient is φ = 8184000.

The previous prime is 20541523. The next prime is 20541557. The reversal of 20541550 is 5514502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541557) 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, 14890 + ... + 16210.

It is an arithmetic number, because the mean of its divisors is an integer number (1598298).

Almost surely, 2^20541550 is an apocalyptic number.

20541550 is a deficient number, since it is larger than the sum of its proper divisors (17817602).

20541550 is a wasteful number, since it uses less digits than its factorization.

20541550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20541550 is about 4532.2786763393. The cubic root of 20541550 is about 273.8699633374.

The spelling of 20541550 in words is "twenty million, five hundred forty-one thousand, five hundred fifty".