20611061 has 4 divisors (see below), whose sum is σ = 21090432. Its totient is φ = 20131692.

The previous prime is 20611057. The next prime is 20611079. The reversal of 20611061 is 16011602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20611061 - 2² = 20611057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611091) 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, 239621 + ... + 239706.

It is an arithmetic number, because the mean of its divisors is an integer number (5272608).

Almost surely, 2^20611061 is an apocalyptic number.

It is an amenable number.

20611061 is a deficient number, since it is larger than the sum of its proper divisors (479371).

20611061 is an equidigital number, since it uses as much as digits as its factorization.

20611061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479370.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 20611061 is about 4539.9406383784. The cubic root of 20611061 is about 274.1785337242.

Adding to 20611061 its reverse (16011602), we get a palindrome (36622663).

The spelling of 20611061 in words is "twenty million, six hundred eleven thousand, sixty-one".