420850020 has 96 divisors (see below), whose sum is σ = 1200423168. Its totient is φ = 110149632.

The previous prime is 420849997. The next prime is 420850043. The reversal of 420850020 is 20058024.

420850020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (420849997) and next prime (420850043).

It is a super-2 number, since 2×420850020² = 354229478668000800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 971724 + ... + 972156.

It is an arithmetic number, because the mean of its divisors is an integer number (12504408).

Almost surely, 2^420850020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420850020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600211584).

420850020 is an abundant number, since it is smaller than the sum of its proper divisors (779573148).

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

420850020 is a wasteful number, since it uses less digits than its factorization.

420850020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 420850020 is about 20514.6294141522. The cubic root of 420850020 is about 749.3921118736.

The spelling of 420850020 in words is "four hundred twenty million, eight hundred fifty thousand, twenty".