20512230 has 32 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 5429472.

The previous prime is 20512223. The next prime is 20512241. The reversal of 20512230 is 3221502.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1711 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^20512230 is an apocalyptic number.

20512230 is an abundant number, since it is smaller than the sum of its proper divisors (29081370).

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

20512230 is a wasteful number, since it uses less digits than its factorization.

20512230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20512230 is about 4529.0429452590. The cubic root of 20512230 is about 273.7395984455.

Adding to 20512230 its reverse (3221502), we get a palindrome (23733732).

The spelling of 20512230 in words is "twenty million, five hundred twelve thousand, two hundred thirty".