20485188 has 36 divisors (see below), whose sum is σ = 52114608. Its totient is φ = 6784560.

The previous prime is 20485163. The next prime is 20485193. The reversal of 20485188 is 88158402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4123 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (1447628).

Almost surely, 2^20485188 is an apocalyptic number.

It is an amenable number.

20485188 is an abundant number, since it is smaller than the sum of its proper divisors (31629420).

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

20485188 is a wasteful number, since it uses less digits than its factorization.

20485188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3659 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 20485188 is about 4526.0565617323. The cubic root of 20485188 is about 273.6192520053.

The spelling of 20485188 in words is "twenty million, four hundred eighty-five thousand, one hundred eighty-eight".