20212123230 has 96 divisors (see below), whose sum is σ = 56837604096. Its totient is φ = 4953871872.

The previous prime is 20212123213. The next prime is 20212123289. The reversal of 20212123230 is 3232121202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 235539 + ... + 309681.

It is an arithmetic number, because the mean of its divisors is an integer number (592058376).

Almost surely, 2^20212123230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212123230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28418802048).

20212123230 is an abundant number, since it is smaller than the sum of its proper divisors (36625480866).

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

20212123230 is a wasteful number, since it uses less digits than its factorization.

20212123230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74402 (or 74399 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20212123230 its reverse (3232121202), we get a palindrome (23444244432).

The spelling of 20212123230 in words is "twenty billion, two hundred twelve million, one hundred twenty-three thousand, two hundred thirty".