10020738357891 has 96 divisors (see below), whose sum is σ = 15743399630400. Its totient is φ = 6118617415680.

The previous prime is 10020738357887. The next prime is 10020738357893. The reversal of 10020738357891 is 19875383702001.

It is a happy number.

10020738357891 is a `hidden beast` number, since 1 + 0 + 0 + 207 + 3 + 8 + 357 + 89 + 1 = 666.

It is not a de Polignac number, because 10020738357891 - 2² = 10020738357887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10020738357893) 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 95 ways as a sum of consecutive naturals, for example, 1176000711 + ... + 1176009231.

It is an arithmetic number, because the mean of its divisors is an integer number (163993746150).

Almost surely, 2^{10020738357891} is an apocalyptic number.

10020738357891 is a deficient number, since it is larger than the sum of its proper divisors (5722661272509).

10020738357891 is a wasteful number, since it uses less digits than its factorization.

10020738357891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9989 (or 9986 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 10020738357891 in words is "ten trillion, twenty billion, seven hundred thirty-eight million, three hundred fifty-seven thousand, eight hundred ninety-one".