20540311230 has 64 divisors (see below), whose sum is σ = 51640685568. Its totient is φ = 5218836480.

The previous prime is 20540311199. The next prime is 20540311243. The reversal of 20540311230 is 3211304502.

It is a super-2 number, since 2×20540311230² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20540311197 and 20540311206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119415 + ... + 235245.

It is an arithmetic number, because the mean of its divisors is an integer number (806885712).

Almost surely, 2^20540311230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20540311230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25820342784).

20540311230 is an abundant number, since it is smaller than the sum of its proper divisors (31100374338).

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

20540311230 is a wasteful number, since it uses less digits than its factorization.

20540311230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116121.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20540311230 its reverse (3211304502), we get a palindrome (23751615732).

The spelling of 20540311230 in words is "twenty billion, five hundred forty million, three hundred eleven thousand, two hundred thirty".