423220213442340 has 72 divisors (see below), whose sum is σ = 1304813357542968. Its totient is φ = 111008580572160.

The previous prime is 423220213442333. The next prime is 423220213442381. The reversal of 423220213442340 is 43244312022324.

423220213442340 is a `hidden beast` number, since 4 + 2 + 3 + 2 + 202 + 1 + 3 + 442 + 3 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10969502976576 + 412250710465764 = 3312024^2 + 20303958^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 423220213442295 and 423220213442304.

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, 19272312037 + ... + 19272333996.

Almost surely, 2^{423220213442340} is an apocalyptic number.

It is an amenable number.

423220213442340 is an abundant number, since it is smaller than the sum of its proper divisors (881593144100628).

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

423220213442340 is a wasteful number, since it uses less digits than its factorization.

423220213442340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38544646109 (or 38544646104 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 423220213442340 its reverse (43244312022324), we get a palindrome (466464525464664).

The spelling of 423220213442340 in words is "four hundred twenty-three trillion, two hundred twenty billion, two hundred thirteen million, four hundred forty-two thousand, three hundred forty".