20420023300043 has 4 divisors (see below), whose sum is σ = 21621201141240. Its totient is φ = 19218845458848.

The previous prime is 20420023299989. The next prime is 20420023300049. The reversal of 20420023300043 is 34000332002402.

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 20420023300043 - 2³⁸ = 20145145393099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420023299991 and 20420023300018.

It is not an unprimeable number, because it can be changed into a prime (20420023300049) 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, 600588920573 + ... + 600588920606.

It is an arithmetic number, because the mean of its divisors is an integer number (5405300285310).

Almost surely, 2^{20420023300043} is an apocalyptic number.

20420023300043 is a deficient number, since it is larger than the sum of its proper divisors (1201177841197).

20420023300043 is a wasteful number, since it uses less digits than its factorization.

20420023300043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201177841196.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20420023300043 its reverse (34000332002402), we get a palindrome (54420355302445).

The spelling of 20420023300043 in words is "twenty trillion, four hundred twenty billion, twenty-three million, three hundred thousand, forty-three".