20559190 has 16 divisors (see below), whose sum is σ = 37236528. Its totient is φ = 8172576.

The previous prime is 20559157. The next prime is 20559191. The reversal of 20559190 is 9195502.

It is a super-2 number, since 2×20559190² = 845360586912200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20559191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (2327283).

Almost surely, 2^20559190 is an apocalyptic number.

20559190 is a deficient number, since it is larger than the sum of its proper divisors (16677338).

20559190 is a wasteful number, since it uses less digits than its factorization.

20559190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 20559190 is about 4534.2242997011. The cubic root of 20559190 is about 273.9483359355.

It can be divided in two parts, 205 and 59190, that added together give a palindrome (59395).

The spelling of 20559190 in words is "twenty million, five hundred fifty-nine thousand, one hundred ninety".