20509171147302 has 32 divisors (see below), whose sum is σ = 42382503905280. Its totient is φ = 6609457085760.

The previous prime is 20509171147261. The next prime is 20509171147319. The reversal of 20509171147302 is 20374117190502.

It is a super-2 number, since 2×20509171147302² (a number of 27 digits) contains 22 as substring.

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, 53178802 + ... + 53563077.

It is an arithmetic number, because the mean of its divisors is an integer number (1324453247040).

Almost surely, 2^{20509171147302} is an apocalyptic number.

20509171147302 is an abundant number, since it is smaller than the sum of its proper divisors (21873332757978).

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

20509171147302 is a wasteful number, since it uses less digits than its factorization.

20509171147302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106742948.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 20509171147302 in words is "twenty trillion, five hundred nine billion, one hundred seventy-one million, one hundred forty-seven thousand, three hundred two".