20400340130 has 48 divisors (see below), whose sum is σ = 39203789184. Its totient is φ = 7639183200.

The previous prime is 20400340123. The next prime is 20400340141. The reversal of 20400340130 is 3104300402.

It is a junction number, because it is equal to n+sod(n) for n = 20400340099 and 20400340108.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207605 + ... + 289655.

It is an arithmetic number, because the mean of its divisors is an integer number (816745608).

Almost surely, 2^20400340130 is an apocalyptic number.

20400340130 is a deficient number, since it is larger than the sum of its proper divisors (18803449054).

20400340130 is a wasteful number, since it uses less digits than its factorization.

20400340130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82151 (or 82128 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20400340130 its reverse (3104300402), we get a palindrome (23504640532).

The spelling of 20400340130 in words is "twenty billion, four hundred million, three hundred forty thousand, one hundred thirty".