20441555 has 16 divisors (see below), whose sum is σ = 25918464. Its totient is φ = 15452640.

The previous prime is 20441471. The next prime is 20441563. The reversal of 20441555 is 55514402.

It is not a de Polignac number, because 20441555 - 2¹⁶ = 20376019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5132 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (1619904).

Almost surely, 2^20441555 is an apocalyptic number.

20441555 is a deficient number, since it is larger than the sum of its proper divisors (5476909).

20441555 is a wasteful number, since it uses less digits than its factorization.

20441555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 20441555 is about 4521.2337917874. The cubic root of 20441555 is about 273.4248462498.

Adding to 20441555 its reverse (55514402), we get a palindrome (75955957).

The spelling of 20441555 in words is "twenty million, four hundred forty-one thousand, five hundred fifty-five".