20075818 has 32 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 8028720.

The previous prime is 20075807. The next prime is 20075821. The reversal of 20075818 is 81857002.

It is a self number, because there is not a number n which added to its sum of digits gives 20075818.

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 15 ways as a sum of consecutive naturals, for example, 18355 + ... + 19417.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^20075818 is an apocalyptic number.

20075818 is a deficient number, since it is larger than the sum of its proper divisors (16696022).

20075818 is a wasteful number, since it uses less digits than its factorization.

20075818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 20075818 is about 4480.6046466967. The cubic root of 20075818 is about 271.7843319983.

The spelling of 20075818 in words is "twenty million, seventy-five thousand, eight hundred eighteen".