20430231024340 has 12 divisors (see below), whose sum is σ = 42903485151156. Its totient is φ = 8172092409728.

The previous prime is 20430231024319. The next prime is 20430231024377. The reversal of 20430231024340 is 4342013203402.

It can be written as a sum of positive squares in 2 ways, for example, as 7640480996164 + 12789750028176 = 2764142^2 + 3576276^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20430231024299 and 20430231024308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510755775589 + ... + 510755775628.

It is an arithmetic number, because the mean of its divisors is an integer number (3575290429263).

Almost surely, 2^{20430231024340} is an apocalyptic number.

20430231024340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430231024340 is an abundant number, since it is smaller than the sum of its proper divisors (22473254126816).

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

20430231024340 is a wasteful number, since it uses less digits than its factorization.

20430231024340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021511551226 (or 1021511551224 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20430231024340 its reverse (4342013203402), we get a palindrome (24772244227742).

The spelling of 20430231024340 in words is "twenty trillion, four hundred thirty billion, two hundred thirty-one million, twenty-four thousand, three hundred forty".