20409408300 has 72 divisors (see below), whose sum is σ = 61087496400. Its totient is φ = 5254833920.

The previous prime is 20409408241. The next prime is 20409408301. The reversal of 20409408300 is 380490402.

It is a happy number.

It is a super-2 number, since 2×20409408300² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20409408301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1164255 + ... + 1181654.

It is an arithmetic number, because the mean of its divisors is an integer number (848437450).

Almost surely, 2^20409408300 is an apocalyptic number.

20409408300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20409408300 is an abundant number, since it is smaller than the sum of its proper divisors (40678088100).

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

20409408300 is a wasteful number, since it uses less digits than its factorization.

20409408300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345955 (or 2345948 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 20409408300 its reverse (380490402), we get a palindrome (20789898702).

The spelling of 20409408300 in words is "twenty billion, four hundred nine million, four hundred eight thousand, three hundred".