209007233542 has 4 divisors (see below), whose sum is σ = 313510850316. Its totient is φ = 104503616770.

The previous prime is 209007233527. The next prime is 209007233549. The reversal of 209007233542 is 245332700902.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209007233549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52251808384 + ... + 52251808387.

It is an arithmetic number, because the mean of its divisors is an integer number (78377712579).

Almost surely, 2^209007233542 is an apocalyptic number.

209007233542 is a deficient number, since it is larger than the sum of its proper divisors (104503616774).

209007233542 is a wasteful number, since it uses less digits than its factorization.

209007233542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104503616773.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 209007233542 in words is "two hundred nine billion, seven million, two hundred thirty-three thousand, five hundred forty-two".