20627161 has 4 divisors (see below), whose sum is σ = 20753872. Its totient is φ = 20500452.

The previous prime is 20627153. The next prime is 20627197. The reversal of 20627161 is 16172602.

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 20627161 - 2³ = 20627153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20627111) 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, 63111 + ... + 63436.

It is an arithmetic number, because the mean of its divisors is an integer number (5188468).

Almost surely, 2^20627161 is an apocalyptic number.

It is an amenable number.

20627161 is a deficient number, since it is larger than the sum of its proper divisors (126711).

20627161 is a wasteful number, since it uses less digits than its factorization.

20627161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126710.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20627161 is about 4541.7134431842. The cubic root of 20627161 is about 274.2499051998.

Adding to 20627161 its reverse (16172602), we get a palindrome (36799763).

The spelling of 20627161 in words is "twenty million, six hundred twenty-seven thousand, one hundred sixty-one".