20540251920167 has 32 divisors (see below), whose sum is σ = 24921141747840. Its totient is φ = 16526492467200.

The previous prime is 20540251920151. The next prime is 20540251920233. The reversal of 20540251920167 is 76102915204502.

It is a cyclic number.

It is not a de Polignac number, because 20540251920167 - 2⁴ = 20540251920151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540251920667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361538459 + ... + 361595267.

It is an arithmetic number, because the mean of its divisors is an integer number (778785679620).

Almost surely, 2^{20540251920167} is an apocalyptic number.

20540251920167 is a deficient number, since it is larger than the sum of its proper divisors (4380889827673).

20540251920167 is a wasteful number, since it uses less digits than its factorization.

20540251920167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64811.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 20540251920167 in words is "twenty trillion, five hundred forty billion, two hundred fifty-one million, nine hundred twenty thousand, one hundred sixty-seven".