420023123511 has 16 divisors (see below), whose sum is σ = 570078051840. Its totient is φ = 275021798240.

The previous prime is 420023123491. The next prime is 420023123557. The reversal of 420023123511 is 115321320024.

It is a cyclic number.

It is not a de Polignac number, because 420023123511 - 2²³ = 420014734903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420023123561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3692916 + ... + 3804953.

It is an arithmetic number, because the mean of its divisors is an integer number (35629878240).

Almost surely, 2^420023123511 is an apocalyptic number.

420023123511 is a deficient number, since it is larger than the sum of its proper divisors (150054928329).

420023123511 is a wasteful number, since it uses less digits than its factorization.

420023123511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7498206.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 420023123511 its reverse (115321320024), we get a palindrome (535344443535).

The spelling of 420023123511 in words is "four hundred twenty billion, twenty-three million, one hundred twenty-three thousand, five hundred eleven".