20117884 has 24 divisors (see below), whose sum is σ = 38259200. Its totient is φ = 9221040.

The previous prime is 20117869. The next prime is 20117891. The reversal of 20117884 is 48871102.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914 + ... + 6625.

Almost surely, 2^20117884 is an apocalyptic number.

It is an amenable number.

20117884 is a deficient number, since it is larger than the sum of its proper divisors (18141316).

20117884 is a wasteful number, since it uses less digits than its factorization.

20117884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593 (or 8591 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 20117884 is about 4485.2964227574. The cubic root of 20117884 is about 271.9740279411.

Adding to 20117884 its reverse (48871102), we get a palindrome (68988986).

The spelling of 20117884 in words is "twenty million, one hundred seventeen thousand, eight hundred eighty-four".