20209047258172 has 12 divisors (see below), whose sum is σ = 35366935043440. Its totient is φ = 10104208674336.

The previous prime is 20209047258089. The next prime is 20209047258181. The reversal of 20209047258172 is 27185274090202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78594288 + ... + 78850999.

Almost surely, 2^{20209047258172} is an apocalyptic number.

It is an amenable number.

20209047258172 is a deficient number, since it is larger than the sum of its proper divisors (15157887785268).

20209047258172 is a wasteful number, since it uses less digits than its factorization.

20209047258172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157477380 (or 157477378 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 20209047258172 in words is "twenty trillion, two hundred nine billion, forty-seven million, two hundred fifty-eight thousand, one hundred seventy-two".