421700020 has 48 divisors (see below), whose sum is σ = 1046989440. Its totient is φ = 139595904.

The previous prime is 421700017. The next prime is 421700023. The reversal of 421700020 is 20007124.

It is an interprime number because it is at equal distance from previous prime (421700017) and next prime (421700023).

It is a junction number, because it is equal to n+sod(n) for n = 421699967 and 421700003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421700023) 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, 47874 + ... + 55993.

It is an arithmetic number, because the mean of its divisors is an integer number (21812280).

Almost surely, 2^421700020 is an apocalyptic number.

It is an amenable number.

421700020 is an abundant number, since it is smaller than the sum of its proper divisors (625289420).

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

421700020 is a wasteful number, since it uses less digits than its factorization.

421700020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103912 (or 103910 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 421700020 is about 20535.3358871970. The cubic root of 421700020 is about 749.8962938088.

Adding to 421700020 its reverse (20007124), we get a palindrome (441707144).

The spelling of 421700020 in words is "four hundred twenty-one million, seven hundred thousand, twenty".