402212320020 has 72 divisors (see below), whose sum is σ = 1394336047104. Its totient is φ = 91934244288.

The previous prime is 402212319997. The next prime is 402212320031. The reversal of 402212320020 is 20023212204.

402212320020 is a `hidden beast` number, since 402 + 21 + 23 + 200 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402212319975 and 402212320002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159606804 + ... + 159609323.

It is an arithmetic number, because the mean of its divisors is an integer number (19365778432).

Almost surely, 2^402212320020 is an apocalyptic number.

It is an amenable number.

402212320020 is an abundant number, since it is smaller than the sum of its proper divisors (992123727084).

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

402212320020 is a wasteful number, since it uses less digits than its factorization.

402212320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319216149 (or 319216144 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 402212320020 its reverse (20023212204), we get a palindrome (422235532224).

The spelling of 402212320020 in words is "four hundred two billion, two hundred twelve million, three hundred twenty thousand, twenty".