420234421403 has 4 divisors (see below), whose sum is σ = 430007314968. Its totient is φ = 410461527840.

The previous prime is 420234421333. The next prime is 420234421463. The reversal of 420234421403 is 304124432024.

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 420234421403 - 2²⁸ = 419965985947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420234421463) 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, 4886446718 + ... + 4886446803.

It is an arithmetic number, because the mean of its divisors is an integer number (107501828742).

Almost surely, 2^420234421403 is an apocalyptic number.

420234421403 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

420234421403 is a deficient number, since it is larger than the sum of its proper divisors (9772893565).

420234421403 is an equidigital number, since it uses as much as digits as its factorization.

420234421403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9772893564.

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

Adding to 420234421403 its reverse (304124432024), we get a palindrome (724358853427).

The spelling of 420234421403 in words is "four hundred twenty billion, two hundred thirty-four million, four hundred twenty-one thousand, four hundred three".