109205247720 has 32 divisors (see below), whose sum is σ = 327615743520. Its totient is φ = 29121399360.

The previous prime is 109205247691. The next prime is 109205247721. The reversal of 109205247720 is 27742502901.

It is a super-2 number, since 2×109205247720² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109205247721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455021746 + ... + 455021985.

It is an arithmetic number, because the mean of its divisors is an integer number (10237991985).

Almost surely, 2^109205247720 is an apocalyptic number.

109205247720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109205247720 is an abundant number, since it is smaller than the sum of its proper divisors (218410495800).

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

109205247720 is a wasteful number, since it uses less digits than its factorization.

109205247720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910043745 (or 910043741 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 109205247720 in words is "one hundred nine billion, two hundred five million, two hundred forty-seven thousand, seven hundred twenty".