20434400409 has 8 divisors (see below), whose sum is σ = 27291355200. Its totient is φ = 13600189616.

The previous prime is 20434400387. The next prime is 20434400449. The reversal of 20434400409 is 90400443402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20434400409 - 2⁵ = 20434400377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434400449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5683902 + ... + 5687495.

It is an arithmetic number, because the mean of its divisors is an integer number (3411419400).

Almost surely, 2^20434400409 is an apocalyptic number.

It is an amenable number.

20434400409 is a deficient number, since it is larger than the sum of its proper divisors (6856954791).

20434400409 is a wasteful number, since it uses less digits than its factorization.

20434400409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371999.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20434400409 in words is "twenty billion, four hundred thirty-four million, four hundred thousand, four hundred nine".