20485404 has 36 divisors (see below), whose sum is σ = 53049360. Its totient is φ = 6661440.

The previous prime is 20485369. The next prime is 20485427. The reversal of 20485404 is 40458402.

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

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 11 ways as a sum of consecutive naturals, for example, 5464 + ... + 8415.

Almost surely, 2^20485404 is an apocalyptic number.

It is an amenable number.

20485404 is an abundant number, since it is smaller than the sum of its proper divisors (32563956).

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

20485404 is a wasteful number, since it uses less digits than its factorization.

20485404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930 (or 13925 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20485404 is about 4526.0804235011. The cubic root of 20485404 is about 273.6202137010.

The spelling of 20485404 in words is "twenty million, four hundred eighty-five thousand, four hundred four".