20880611 has 4 divisors (see below), whose sum is σ = 20889792. Its totient is φ = 20871432.

The previous prime is 20880571. The next prime is 20880623. The reversal of 20880611 is 11608802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20880611 - 2⁶ = 20880547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20880911) 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, 1646 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (5222448).

Almost surely, 2^20880611 is an apocalyptic number.

20880611 is a deficient number, since it is larger than the sum of its proper divisors (9181).

20880611 is an equidigital number, since it uses as much as digits as its factorization.

20880611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9180.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 20880611 is about 4569.5307198880. The cubic root of 20880611 is about 275.3685900454.

The spelling of 20880611 in words is "twenty million, eight hundred eighty thousand, six hundred eleven".