20616411 has 4 divisors (see below), whose sum is σ = 27488552. Its totient is φ = 13744272.

The previous prime is 20616397. The next prime is 20616413. The reversal of 20616411 is 11461602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20616411 - 2¹³ = 20608219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20616413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3436066 + ... + 3436071.

It is an arithmetic number, because the mean of its divisors is an integer number (6872138).

Almost surely, 2^20616411 is an apocalyptic number.

20616411 is a deficient number, since it is larger than the sum of its proper divisors (6872141).

20616411 is an equidigital number, since it uses as much as digits as its factorization.

20616411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872140.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20616411 is about 4540.5298149005. The cubic root of 20616411 is about 274.2022544545.

The spelling of 20616411 in words is "twenty million, six hundred sixteen thousand, four hundred eleven".