20550481 has 8 divisors (see below), whose sum is σ = 23549760. Its totient is φ = 17567088.

The previous prime is 20550479. The next prime is 20550493. The reversal of 20550481 is 18405502.

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

It is not a de Polignac number, because 20550481 - 2¹ = 20550479 is a prime.

It is a super-2 number, since 2×20550481² = 844644538662722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 6496.

It is an arithmetic number, because the mean of its divisors is an integer number (2943720).

Almost surely, 2^20550481 is an apocalyptic number.

It is an amenable number.

20550481 is a deficient number, since it is larger than the sum of its proper divisors (2999279).

20550481 is an equidigital number, since it uses as much as digits as its factorization.

20550481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7943.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20550481 is about 4533.2638352516. The cubic root of 20550481 is about 273.9096484026.

Adding to 20550481 its reverse (18405502), we get a palindrome (38955983).

The spelling of 20550481 in words is "twenty million, five hundred fifty thousand, four hundred eighty-one".