20967208 has 8 divisors (see below), whose sum is σ = 39313530. Its totient is φ = 10483600.

The previous prime is 20967161. The next prime is 20967209. The reversal of 20967208 is 80276902.

It can be written as a sum of positive squares in only one way, i.e., 20775364 + 191844 = 4558^2 + 438^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20967208² = 879247622630528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20967209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310443 + ... + 1310458.

Almost surely, 2^20967208 is an apocalyptic number.

It is an amenable number.

20967208 is a deficient number, since it is larger than the sum of its proper divisors (18346322).

20967208 is a wasteful number, since it uses less digits than its factorization.

20967208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620907 (or 2620903 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20967208 is about 4578.9963965917. The cubic root of 20967208 is about 275.7487386331.

The spelling of 20967208 in words is "twenty million, nine hundred sixty-seven thousand, two hundred eight".