20460188 has 24 divisors (see below), whose sum is σ = 43075200. Its totient is φ = 8306928.

The previous prime is 20460157. The next prime is 20460199. The reversal of 20460188 is 88106402.

It is a self number, because there is not a number n which added to its sum of digits gives 20460188.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18698 + ... + 19761.

It is an arithmetic number, because the mean of its divisors is an integer number (1794800).

Almost surely, 2^20460188 is an apocalyptic number.

20460188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20460188 is an abundant number, since it is smaller than the sum of its proper divisors (22615012).

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

20460188 is a wasteful number, since it uses less digits than its factorization.

20460188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38489 (or 38487 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20460188 is about 4523.2939325231. The cubic root of 20460188 is about 273.5078989327.

The spelling of 20460188 in words is "twenty million, four hundred sixty thousand, one hundred eighty-eight".