20550442 has 8 divisors (see below), whose sum is σ = 33628032. Its totient is φ = 9341100.

The previous prime is 20550437. The next prime is 20550443. The reversal of 20550442 is 24405502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 934111 = 20550442 / (2 + 0 + 5 + 5 + 0 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (20550443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467034 + ... + 467077.

It is an arithmetic number, because the mean of its divisors is an integer number (4203504).

Almost surely, 2^20550442 is an apocalyptic number.

20550442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20550442 is a deficient number, since it is larger than the sum of its proper divisors (13077590).

20550442 is a wasteful number, since it uses less digits than its factorization.

20550442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934124.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20550442 is about 4533.2595337130. The cubic root of 20550442 is about 273.9094751303.

Adding to 20550442 its reverse (24405502), we get a palindrome (44955944).

The spelling of 20550442 in words is "twenty million, five hundred fifty thousand, four hundred forty-two".