20606611 has 4 divisors (see below), whose sum is σ = 20755000. Its totient is φ = 20458224.

The previous prime is 20606563. The next prime is 20606627. The reversal of 20606611 is 11660602.

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

It is a cyclic number.

It is not a de Polignac number, because 20606611 - 2⁷ = 20606483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20606681) 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, 73986 + ... + 74263.

It is an arithmetic number, because the mean of its divisors is an integer number (5188750).

Almost surely, 2^20606611 is an apocalyptic number.

20606611 is a deficient number, since it is larger than the sum of its proper divisors (148389).

20606611 is a wasteful number, since it uses less digits than its factorization.

20606611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148388.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20606611 is about 4539.4505174085. The cubic root of 20606611 is about 274.1588002699.

The spelling of 20606611 in words is "twenty million, six hundred six thousand, six hundred eleven".