20767172 has 6 divisors (see below), whose sum is σ = 36342558. Its totient is φ = 10383584.

The previous prime is 20767163. The next prime is 20767189. The reversal of 20767172 is 27176702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13060996 + 7706176 = 3614^2 + 2776^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595893 + ... + 2595900.

It is an arithmetic number, because the mean of its divisors is an integer number (6057093).

Almost surely, 2^20767172 is an apocalyptic number.

It is an amenable number.

20767172 is a deficient number, since it is larger than the sum of its proper divisors (15575386).

20767172 is a wasteful number, since it uses less digits than its factorization.

20767172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191797 (or 5191795 counting only the distinct ones).

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

The square root of 20767172 is about 4557.1012716419. The cubic root of 20767172 is about 274.8690153068.

The spelling of 20767172 in words is "twenty million, seven hundred sixty-seven thousand, one hundred seventy-two".