20343134400 has 84 divisors (see below), whose sum is σ = 66742449192. Its totient is φ = 5424834560.

The previous prime is 20343134233. The next prime is 20343134417. The reversal of 20343134400 is 443134302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2114277 + ... + 2123876.

Almost surely, 2^20343134400 is an apocalyptic number.

20343134400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20343134400 is an abundant number, since it is smaller than the sum of its proper divisors (46399314792).

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

20343134400 is a wasteful number, since it uses less digits than its factorization.

20343134400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238178 (or 4238163 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20343134400 its reverse (443134302), we get a palindrome (20786268702).

The spelling of 20343134400 in words is "twenty billion, three hundred forty-three million, one hundred thirty-four thousand, four hundred".