20441477 has 6 divisors (see below), whose sum is σ = 23778918. Its totient is φ = 17521224.

The previous prime is 20441471. The next prime is 20441563. The reversal of 20441477 is 77414402.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 3786916 = 4081^2 + 1946^2 .

It is not a de Polignac number, because 20441477 - 2⁴ = 20441461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20441471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208538 + ... + 208635.

It is an arithmetic number, because the mean of its divisors is an integer number (3963153).

Almost surely, 2^20441477 is an apocalyptic number.

It is an amenable number.

20441477 is a deficient number, since it is larger than the sum of its proper divisors (3337441).

20441477 is an equidigital number, since it uses as much as digits as its factorization.

20441477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417187 (or 417180 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 20441477 is about 4521.2251658151. The cubic root of 20441477 is about 273.4244984751.

Adding to 20441477 its reverse (77414402), we get a palindrome (97855879).

The spelling of 20441477 in words is "twenty million, four hundred forty-one thousand, four hundred seventy-seven".