20340406043 has 4 divisors (see below), whose sum is σ = 20340735168. Its totient is φ = 20340076920.

The previous prime is 20340405997. The next prime is 20340406069. The reversal of 20340406043 is 34060404302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20340406043 - 2¹⁶ = 20340340507 is a prime.

It is a super-2 number, since 2×20340406043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340406343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40868 + ... + 205793.

It is an arithmetic number, because the mean of its divisors is an integer number (5085183792).

Almost surely, 2^20340406043 is an apocalyptic number.

20340406043 is a deficient number, since it is larger than the sum of its proper divisors (329125).

20340406043 is an equidigital number, since it uses as much as digits as its factorization.

20340406043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329124.

The product of its (nonzero) digits is 6912, while the sum is 26.

The spelling of 20340406043 in words is "twenty billion, three hundred forty million, four hundred six thousand, forty-three".