420333423421 has 16 divisors (see below), whose sum is σ = 457146063360. Its totient is φ = 385013226240.

The previous prime is 420333423343. The next prime is 420333423427. The reversal of 420333423421 is 124324333024.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420333423421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420333423427) 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, 320865 + ... + 971401.

It is an arithmetic number, because the mean of its divisors is an integer number (28571628960).

Almost surely, 2^420333423421 is an apocalyptic number.

It is an amenable number.

420333423421 is a deficient number, since it is larger than the sum of its proper divisors (36812639939).

420333423421 is a wasteful number, since it uses less digits than its factorization.

420333423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651684.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 420333423421 its reverse (124324333024), we get a palindrome (544657756445).

The spelling of 420333423421 in words is "four hundred twenty billion, three hundred thirty-three million, four hundred twenty-three thousand, four hundred twenty-one".