20400340300 has 18 divisors (see below), whose sum is σ = 44268738668. Its totient is φ = 8160136080.

The previous prime is 20400340273. The next prime is 20400340321. The reversal of 20400340300 is 304300402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102001602 + ... + 102001801.

Almost surely, 2^20400340300 is an apocalyptic number.

20400340300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400340300 is an abundant number, since it is smaller than the sum of its proper divisors (23868398368).

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

20400340300 is a wasteful number, since it uses less digits than its factorization.

20400340300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204003417 (or 204003410 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

Adding to 20400340300 its reverse (304300402), we get a palindrome (20704640702).

The spelling of 20400340300 in words is "twenty billion, four hundred million, three hundred forty thousand, three hundred".