209142109732 has 12 divisors (see below), whose sum is σ = 366491293056. Its totient is φ = 104430311720.

The previous prime is 209142109727. The next prime is 209142109733. The reversal of 209142109732 is 237901241902.

It is a super-2 number, since 2×209142109732² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209142109733) 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, 35182444 + ... + 35188387.

It is an arithmetic number, because the mean of its divisors is an integer number (30540941088).

Almost surely, 2^209142109732 is an apocalyptic number.

It is an amenable number.

209142109732 is a deficient number, since it is larger than the sum of its proper divisors (157349183324).

209142109732 is a wasteful number, since it uses less digits than its factorization.

209142109732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70371578 (or 70371576 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 209142109732 in words is "two hundred nine billion, one hundred forty-two million, one hundred nine thousand, seven hundred thirty-two".