20130312204 has 288 divisors, whose sum is σ = 59156697600. Its totient is φ = 5730600960.

The previous prime is 20130312161. The next prime is 20130312227. The reversal of 20130312204 is 40221303102.

20130312204 is a `hidden beast` number, since 20 + 130 + 312 + 204 = 666.

It is a super-2 number, since 2×20130312204² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30546427 + ... + 30547085.

It is an arithmetic number, because the mean of its divisors is an integer number (205405200).

Almost surely, 2^20130312204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20130312204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29578348800).

20130312204 is an abundant number, since it is smaller than the sum of its proper divisors (39026385396).

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

20130312204 is a wasteful number, since it uses less digits than its factorization.

20130312204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 808 counting only the distinct ones).

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

Adding to 20130312204 its reverse (40221303102), we get a palindrome (60351615306).

The spelling of 20130312204 in words is "twenty billion, one hundred thirty million, three hundred twelve thousand, two hundred four".