20400354300 has 144 divisors (see below), whose sum is σ = 60043934720. Its totient is φ = 5346570240.

The previous prime is 20400354287. The next prime is 20400354311. The reversal of 20400354300 is 345300402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11596821 + ... + 11598579.

Almost surely, 2^20400354300 is an apocalyptic number.

20400354300 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 20400354300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30021967360).

20400354300 is an abundant number, since it is smaller than the sum of its proper divisors (39643580420).

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

20400354300 is a wasteful number, since it uses less digits than its factorization.

20400354300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20400354300 its reverse (345300402), we get a palindrome (20745654702).

The spelling of 20400354300 in words is "twenty billion, four hundred million, three hundred fifty-four thousand, three hundred".