20420130433 has 4 divisors (see below), whose sum is σ = 21494874160. Its totient is φ = 19345386708.

The previous prime is 20420130421. The next prime is 20420130461. The reversal of 20420130433 is 33403102402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20420130433 - 2²¹ = 20418033281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420130403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537371835 + ... + 537371872.

It is an arithmetic number, because the mean of its divisors is an integer number (5373718540).

Almost surely, 2^20420130433 is an apocalyptic number.

It is an amenable number.

20420130433 is a deficient number, since it is larger than the sum of its proper divisors (1074743727).

20420130433 is a wasteful number, since it uses less digits than its factorization.

20420130433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074743726.

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

Adding to 20420130433 its reverse (33403102402), we get a palindrome (53823232835).

The spelling of 20420130433 in words is "twenty billion, four hundred twenty million, one hundred thirty thousand, four hundred thirty-three".