20036768814657 has 32 divisors (see below), whose sum is σ = 33924973305600. Its totient is φ = 11449485869184.

The previous prime is 20036768814607. The next prime is 20036768814691. The reversal of 20036768814657 is 75641886763002.

20036768814657 is a `hidden beast` number, since 2 + 0 + 0 + 36 + 7 + 68 + 81 + 465 + 7 = 666.

It is not a de Polignac number, because 20036768814657 - 2⁶ = 20036768814593 is a prime.

It is a super-2 number, since 2×20036768814657² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 20036768814594 and 20036768814603.

It is not an unprimeable number, because it can be changed into a prime (20036768814607) 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, 26322319 + ... + 27072827.

It is an arithmetic number, because the mean of its divisors is an integer number (1060155415800).

Almost surely, 2^{20036768814657} is an apocalyptic number.

20036768814657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20036768814657 is a deficient number, since it is larger than the sum of its proper divisors (13888204490943).

20036768814657 is a wasteful number, since it uses less digits than its factorization.

20036768814657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891782 (or 891776 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 20036768814657 in words is "twenty trillion, thirty-six billion, seven hundred sixty-eight million, eight hundred fourteen thousand, six hundred fifty-seven".