20445411 has 8 divisors (see below), whose sum is σ = 31154944. Its totient is φ = 11683080.

The previous prime is 20445361. The next prime is 20445427. The reversal of 20445411 is 11454402.

It is a happy number.

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

It is not a de Polignac number, because 20445411 - 2⁷ = 20445283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 973591 = 20445411 / (2 + 0 + 4 + 4 + 5 + 4 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20446411) 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, 486775 + ... + 486816.

It is an arithmetic number, because the mean of its divisors is an integer number (3894368).

Almost surely, 2^20445411 is an apocalyptic number.

20445411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20445411 is a deficient number, since it is larger than the sum of its proper divisors (10709533).

20445411 is an equidigital number, since it uses as much as digits as its factorization.

20445411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973601.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20445411 is about 4521.6602039516. The cubic root of 20445411 is about 273.4420376999.

Adding to 20445411 its reverse (11454402), we get a palindrome (31899813).

The spelling of 20445411 in words is "twenty million, four hundred forty-five thousand, four hundred eleven".