20554261 has 8 divisors (see below), whose sum is σ = 25297664. Its totient is φ = 16262640.

The previous prime is 20554253. The next prime is 20554279. The reversal of 20554261 is 16245502.

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

It is a cyclic number.

It is not a de Polignac number, because 20554261 - 2³ = 20554253 is a prime.

It is a super-2 number, since 2×20554261² = 844955290512242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112845 + ... + 113026.

It is an arithmetic number, because the mean of its divisors is an integer number (3162208).

Almost surely, 2^20554261 is an apocalyptic number.

It is an amenable number.

20554261 is a deficient number, since it is larger than the sum of its proper divisors (4743403).

20554261 is a wasteful number, since it uses less digits than its factorization.

20554261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225891.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20554261 is about 4533.6807342379. The cubic root of 20554261 is about 273.9264414401.

Adding to 20554261 its reverse (16245502), we get a palindrome (36799763).

The spelling of 20554261 in words is "twenty million, five hundred fifty-four thousand, two hundred sixty-one".