20140434220 has 48 divisors (see below), whose sum is σ = 43478295840. Its totient is φ = 7831171584.

The previous prime is 20140434217. The next prime is 20140434239. The reversal of 20140434220 is 2243404102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20140434191 and 20140434200.

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, 823407 + ... + 847513.

It is an arithmetic number, because the mean of its divisors is an integer number (905797830).

Almost surely, 2^20140434220 is an apocalyptic number.

20140434220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20140434220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21739147920).

20140434220 is an abundant number, since it is smaller than the sum of its proper divisors (23337861620).

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

20140434220 is a wasteful number, since it uses less digits than its factorization.

20140434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25282 (or 25280 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20140434220 its reverse (2243404102), we get a palindrome (22383838322).

The spelling of 20140434220 in words is "twenty billion, one hundred forty million, four hundred thirty-four thousand, two hundred twenty".