20606167 has 4 divisors (see below), whose sum is σ = 20798856. Its totient is φ = 20413480.

The previous prime is 20606143. The next prime is 20606171. The reversal of 20606167 is 76160602.

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 20606167 - 2²³ = 12217559 is a prime.

It is a super-2 number, since 2×20606167² = 849228236863778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606177) 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, 96184 + ... + 96397.

It is an arithmetic number, because the mean of its divisors is an integer number (5199714).

Almost surely, 2^20606167 is an apocalyptic number.

20606167 is a deficient number, since it is larger than the sum of its proper divisors (192689).

20606167 is a wasteful number, since it uses less digits than its factorization.

20606167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192688.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20606167 is about 4539.4016125476. The cubic root of 20606167 is about 274.1568312031.

Adding to 20606167 its reverse (76160602), we get a palindrome (96766769).

The spelling of 20606167 in words is "twenty million, six hundred six thousand, one hundred sixty-seven".