420206644442 has 8 divisors (see below), whose sum is σ = 678795348756. Its totient is φ = 193941528192.

The previous prime is 420206644399. The next prime is 420206644447. The reversal of 420206644442 is 244446602024.

It can be written as a sum of positive squares in 2 ways, for example, as 418232530681 + 1974113761 = 646709^2 + 44431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 420206644396 and 420206644405.

It is not an unprimeable number, because it can be changed into a prime (420206644447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8080896983 + ... + 8080897034.

Almost surely, 2^420206644442 is an apocalyptic number.

420206644442 is a deficient number, since it is larger than the sum of its proper divisors (258588704314).

420206644442 is a wasteful number, since it uses less digits than its factorization.

420206644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16161794032.

The product of its (nonzero) digits is 294912, while the sum is 38.

The spelling of 420206644442 in words is "four hundred twenty billion, two hundred six million, six hundred forty-four thousand, four hundred forty-two".