420023041220 has 24 divisors (see below), whose sum is σ = 903561763608. Its totient is φ = 163911430400.

The previous prime is 420023041199. The next prime is 420023041259. The reversal of 420023041220 is 22140320024.

It can be written as a sum of positive squares in 4 ways, for example, as 61674742336 + 358348298884 = 248344^2 + 598622^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 420023041192 and 420023041201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256110791 + ... + 256112430.

It is an arithmetic number, because the mean of its divisors is an integer number (37648406817).

Almost surely, 2^420023041220 is an apocalyptic number.

It is an amenable number.

420023041220 is an abundant number, since it is smaller than the sum of its proper divisors (483538722388).

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

420023041220 is a wasteful number, since it uses less digits than its factorization.

420023041220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512223271 (or 512223269 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 420023041220 its reverse (22140320024), we get a palindrome (442163361244).

The spelling of 420023041220 in words is "four hundred twenty billion, twenty-three million, forty-one thousand, two hundred twenty".