209392994442 has 32 divisors (see below), whose sum is σ = 442385118720. Its totient is φ = 65890439280.

The previous prime is 209392994399. The next prime is 209392994443. The reversal of 209392994442 is 244499293902.

209392994442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×209392994442² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (209392994443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3212934 + ... + 3277457.

It is an arithmetic number, because the mean of its divisors is an integer number (13824534960).

Almost surely, 2^209392994442 is an apocalyptic number.

209392994442 is an abundant number, since it is smaller than the sum of its proper divisors (232992124278).

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

209392994442 is a wasteful number, since it uses less digits than its factorization.

209392994442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490698.

The product of its (nonzero) digits is 10077696, while the sum is 57.

The spelling of 209392994442 in words is "two hundred nine billion, three hundred ninety-two million, nine hundred ninety-four thousand, four hundred forty-two".