20578230 has 24 divisors (see below), whose sum is σ = 53503632. Its totient is φ = 5487504.

The previous prime is 20578199. The next prime is 20578237. The reversal of 20578230 is 3287502.

It is a junction number, because it is equal to n+sod(n) for n = 20578194 and 20578203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20578237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114234 + ... + 114413.

It is an arithmetic number, because the mean of its divisors is an integer number (2229318).

Almost surely, 2^20578230 is an apocalyptic number.

20578230 is an abundant number, since it is smaller than the sum of its proper divisors (32925402).

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

20578230 is a wasteful number, since it uses less digits than its factorization.

20578230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228660 (or 228657 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20578230 is about 4536.3234011697. The cubic root of 20578230 is about 274.0328782895.

The spelling of 20578230 in words is "twenty million, five hundred seventy-eight thousand, two hundred thirty".