209990094942 has 32 divisors (see below), whose sum is σ = 444726664704. Its totient is φ = 65873059200.

The previous prime is 209990094917. The next prime is 209990094973. The reversal of 209990094942 is 249490099902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062717 + ... + 1244727.

It is an arithmetic number, because the mean of its divisors is an integer number (13897708272).

Almost surely, 2^209990094942 is an apocalyptic number.

209990094942 is an abundant number, since it is smaller than the sum of its proper divisors (234736569762).

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

209990094942 is a wasteful number, since it uses less digits than its factorization.

209990094942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193344.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The spelling of 209990094942 in words is "two hundred nine billion, nine hundred ninety million, ninety-four thousand, nine hundred forty-two".