20770161 has 8 divisors (see below), whose sum is σ = 28337760. Its totient is φ = 13524672.

The previous prime is 20770147. The next prime is 20770163. The reversal of 20770161 is 16107702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20770161 - 2⁹ = 20769649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20770163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80376 + ... + 80633.

It is an arithmetic number, because the mean of its divisors is an integer number (3542220).

Almost surely, 2^20770161 is an apocalyptic number.

It is an amenable number.

20770161 is a deficient number, since it is larger than the sum of its proper divisors (7567599).

20770161 is a wasteful number, since it uses less digits than its factorization.

20770161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161055.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 20770161 is about 4557.4292095435. The cubic root of 20770161 is about 274.8822018892.

Adding to 20770161 its reverse (16107702), we get a palindrome (36877863).

The spelling of 20770161 in words is "twenty million, seven hundred seventy thousand, one hundred sixty-one".