421320020 has 48 divisors (see below), whose sum is σ = 987674688. Its totient is φ = 149640960.

The previous prime is 421320017. The next prime is 421320071. The reversal of 421320020 is 20023124.

It is a junction number, because it is equal to n+sod(n) for n = 421319977 and 421320004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12809 + ... + 31728.

It is an arithmetic number, because the mean of its divisors is an integer number (20576556).

Almost surely, 2^421320020 is an apocalyptic number.

It is an amenable number.

421320020 is an abundant number, since it is smaller than the sum of its proper divisors (566354668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421320020 is a wasteful number, since it uses less digits than its factorization.

421320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44600 (or 44598 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 421320020 is about 20526.0814575018. The cubic root of 421320020 is about 749.6709786440.

Adding to 421320020 its reverse (20023124), we get a palindrome (441343144).

The spelling of 421320020 in words is "four hundred twenty-one million, three hundred twenty thousand, twenty".