20184930 has 32 divisors (see below), whose sum is σ = 53827200. Its totient is φ = 5382576.

The previous prime is 20184929. The next prime is 20184959. The reversal of 20184930 is 3948102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20184894 and 20184903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37110 + ... + 37649.

It is an arithmetic number, because the mean of its divisors is an integer number (1682100).

Almost surely, 2^20184930 is an apocalyptic number.

20184930 is an abundant number, since it is smaller than the sum of its proper divisors (33642270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20184930 is a wasteful number, since it uses less digits than its factorization.

20184930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74775 (or 74769 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20184930 is about 4492.7641825495. The cubic root of 20184930 is about 272.2758249451.

The spelling of 20184930 in words is "twenty million, one hundred eighty-four thousand, nine hundred thirty".