20430437311 has 4 divisors (see below), whose sum is σ = 20431797232. Its totient is φ = 20429077392.

The previous prime is 20430437299. The next prime is 20430437413. The reversal of 20430437311 is 11373403402.

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 20430437311 - 2⁹ = 20430436799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430437311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430431311) 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, 657171 + ... + 687556.

It is an arithmetic number, because the mean of its divisors is an integer number (5107949308).

Almost surely, 2^20430437311 is an apocalyptic number.

20430437311 is a deficient number, since it is larger than the sum of its proper divisors (1359921).

20430437311 is a wasteful number, since it uses less digits than its factorization.

20430437311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359920.

The product of its (nonzero) digits is 6048, while the sum is 28.

The spelling of 20430437311 in words is "twenty billion, four hundred thirty million, four hundred thirty-seven thousand, three hundred eleven".