20430240401234 has 4 divisors (see below), whose sum is σ = 30645360601854. Its totient is φ = 10215120200616.

The previous prime is 20430240401209. The next prime is 20430240401257. The reversal of 20430240401234 is 43210404203402.

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

It can be written as a sum of positive squares in only one way, i.e., 15872455200625 + 4557785200609 = 3984025^2 + 2134897^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20430240401197 and 20430240401206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107560100307 + ... + 5107560100310.

Almost surely, 2^{20430240401234} is an apocalyptic number.

20430240401234 is a deficient number, since it is larger than the sum of its proper divisors (10215120200620).

20430240401234 is a wasteful number, since it uses less digits than its factorization.

20430240401234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215120200619.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 20430240401234 its reverse (43210404203402), we get a palindrome (63640644604636).

The spelling of 20430240401234 in words is "twenty trillion, four hundred thirty billion, two hundred forty million, four hundred one thousand, two hundred thirty-four".