20400034030231 has 4 divisors (see below), whose sum is σ = 20687358453264. Its totient is φ = 20112709607200.

The previous prime is 20400034030217. The next prime is 20400034030289. The reversal of 20400034030231 is 13203043000402.

It is a happy number.

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 20400034030231 - 2³⁵ = 20365674291863 is a prime.

It is a super-2 number, since 2×20400034030231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400034030331) 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, 143662211410 + ... + 143662211551.

It is an arithmetic number, because the mean of its divisors is an integer number (5171839613316).

Almost surely, 2^{20400034030231} is an apocalyptic number.

20400034030231 is a deficient number, since it is larger than the sum of its proper divisors (287324423033).

20400034030231 is an equidigital number, since it uses as much as digits as its factorization.

20400034030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287324423032.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20400034030231 its reverse (13203043000402), we get a palindrome (33603077030633).

The spelling of 20400034030231 in words is "twenty trillion, four hundred billion, thirty-four million, thirty thousand, two hundred thirty-one".