20423010240434 has 16 divisors (see below), whose sum is σ = 30915939456600. Its totient is φ = 10117699352064.

The previous prime is 20423010240431. The next prime is 20423010240461. The reversal of 20423010240434 is 43404201032402.

It can be written as a sum of positive squares in 4 ways, for example, as 19695426830209 + 727583410225 = 4437953^2 + 852985^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20423010240397 and 20423010240406.

It is not an unprimeable number, because it can be changed into a prime (20423010240431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19080962 + ... + 20122850.

Almost surely, 2^{20423010240434} is an apocalyptic number.

20423010240434 is a deficient number, since it is larger than the sum of its proper divisors (10492929216166).

20423010240434 is a wasteful number, since it uses less digits than its factorization.

20423010240434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131917.

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

Adding to 20423010240434 its reverse (43404201032402), we get a palindrome (63827211272836).

The spelling of 20423010240434 in words is "twenty trillion, four hundred twenty-three billion, ten million, two hundred forty thousand, four hundred thirty-four".