20211223230 has 96 divisors (see below), whose sum is σ = 57778126848. Its totient is φ = 4861080000.

The previous prime is 20211223223. The next prime is 20211223231. The reversal of 20211223230 is 3232211202.

20211223230 is a `hidden beast` number, since 2 + 0 + 211 + 223 + 230 = 666.

It is a super-3 number, since 3×20211223230³ (a number of 32 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211223231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45355 + ... + 206105.

It is an arithmetic number, because the mean of its divisors is an integer number (601855488).

Almost surely, 2^20211223230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211223230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28889063424).

20211223230 is an abundant number, since it is smaller than the sum of its proper divisors (37566903618).

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

20211223230 is a wasteful number, since it uses less digits than its factorization.

20211223230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160902 (or 160899 counting only the distinct ones).

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

Adding to 20211223230 its reverse (3232211202), we get a palindrome (23443434432).

The spelling of 20211223230 in words is "twenty billion, two hundred eleven million, two hundred twenty-three thousand, two hundred thirty".