20126130251765 has 16 divisors (see below), whose sum is σ = 24226044254208. Its totient is φ = 16051152616896.

The previous prime is 20126130251749. The next prime is 20126130251797. The reversal of 20126130251765 is 56715203162102.

It is a cyclic number.

It is not a de Polignac number, because 20126130251765 - 2⁴ = 20126130251749 is a prime.

It is a super-3 number, since 3×20126130251765³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

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, 1466207 + ... + 6511683.

It is an arithmetic number, because the mean of its divisors is an integer number (1514127765888).

Almost surely, 2^{20126130251765} is an apocalyptic number.

It is an amenable number.

20126130251765 is a deficient number, since it is larger than the sum of its proper divisors (4099914002443).

20126130251765 is a wasteful number, since it uses less digits than its factorization.

20126130251765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047948.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 20126130251765 in words is "twenty trillion, one hundred twenty-six billion, one hundred thirty million, two hundred fifty-one thousand, seven hundred sixty-five".