20617207156131 has 8 divisors (see below), whose sum is σ = 27899902221504. Its totient is φ = 13539658430760.

The previous prime is 20617207156111. The next prime is 20617207156141. The reversal of 20617207156131 is 13165170271602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20617207156131 - 2¹⁵ = 20617207123363 is a prime.

It is a super-2 number, since 2×20617207156131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20617207156111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51286584765 + ... + 51286585166.

It is an arithmetic number, because the mean of its divisors is an integer number (3487487777688).

Almost surely, 2^{20617207156131} is an apocalyptic number.

20617207156131 is a deficient number, since it is larger than the sum of its proper divisors (7282695065373).

20617207156131 is a wasteful number, since it uses less digits than its factorization.

20617207156131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102573170001.

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

The spelling of 20617207156131 in words is "twenty trillion, six hundred seventeen billion, two hundred seven million, one hundred fifty-six thousand, one hundred thirty-one".