20884156 has 6 divisors (see below), whose sum is σ = 36547280. Its totient is φ = 10442076.

The previous prime is 20884139. The next prime is 20884163. The reversal of 20884156 is 65148802.

It is a super-2 number, since 2×20884156² = 872295943664672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610516 + ... + 2610523.

Almost surely, 2^20884156 is an apocalyptic number.

It is an amenable number.

20884156 is a deficient number, since it is larger than the sum of its proper divisors (15663124).

20884156 is a wasteful number, since it uses less digits than its factorization.

20884156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221043 (or 5221041 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20884156 is about 4569.9185988374. The cubic root of 20884156 is about 275.3841727059.

The spelling of 20884156 in words is "twenty million, eight hundred eighty-four thousand, one hundred fifty-six".