402223212020 has 144 divisors (see below), whose sum is σ = 1025948125440. Its totient is φ = 131825143296.

The previous prime is 402223212019. The next prime is 402223212023. The reversal of 402223212020 is 20212322204.

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 = 402223211983 and 402223212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402223212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42347912 + ... + 42357408.

It is an arithmetic number, because the mean of its divisors is an integer number (7124639760).

Almost surely, 2^402223212020 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 402223212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512974062720).

402223212020 is an abundant number, since it is smaller than the sum of its proper divisors (623724913420).

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

402223212020 is a wasteful number, since it uses less digits than its factorization.

402223212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11422 (or 11413 counting only the distinct ones).

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

Adding to 402223212020 its reverse (20212322204), we get a palindrome (422435534224).

The spelling of 402223212020 in words is "four hundred two billion, two hundred twenty-three million, two hundred twelve thousand, twenty".