20772167 has 8 divisors (see below), whose sum is σ = 22846656. Its totient is φ = 18765792.

The previous prime is 20772137. The next prime is 20772173. The reversal of 20772167 is 76127702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20772167 - 2¹² = 20768071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772107) 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, 16388 + ... + 17609.

It is an arithmetic number, because the mean of its divisors is an integer number (2855832).

Almost surely, 2^20772167 is an apocalyptic number.

20772167 is a deficient number, since it is larger than the sum of its proper divisors (2074489).

20772167 is a wasteful number, since it uses less digits than its factorization.

20772167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34057.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 20772167 is about 4557.6492844448. The cubic root of 20772167 is about 274.8910510574.

Adding to 20772167 its reverse (76127702), we get a palindrome (96899869).

The spelling of 20772167 in words is "twenty million, seven hundred seventy-two thousand, one hundred sixty-seven".