420305342403 has 4 divisors (see below), whose sum is σ = 560407123208. Its totient is φ = 280203561600.

The previous prime is 420305342389. The next prime is 420305342423. The reversal of 420305342403 is 304243503024.

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

It is not a de Polignac number, because 420305342403 - 2⁸ = 420305342147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420305342423) 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, 70050890398 + ... + 70050890403.

It is an arithmetic number, because the mean of its divisors is an integer number (140101780802).

Almost surely, 2^420305342403 is an apocalyptic number.

420305342403 is a deficient number, since it is larger than the sum of its proper divisors (140101780805).

420305342403 is a wasteful number, since it uses less digits than its factorization.

420305342403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140101780804.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 420305342403 its reverse (304243503024), we get a palindrome (724548845427).

The spelling of 420305342403 in words is "four hundred twenty billion, three hundred five million, three hundred forty-two thousand, four hundred three".