20853338571758 has 16 divisors (see below), whose sum is σ = 38998451355264. Its totient is φ = 8124677365560.

The previous prime is 20853338571757. The next prime is 20853338571809. The reversal of 20853338571758 is 85717583335802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20853338571694 and 20853338571703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853338571757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67705644560 + ... + 67705644867.

It is an arithmetic number, because the mean of its divisors is an integer number (2437403209704).

Almost surely, 2^{20853338571758} is an apocalyptic number.

20853338571758 is a deficient number, since it is larger than the sum of its proper divisors (18145112783506).

20853338571758 is a wasteful number, since it uses less digits than its factorization.

20853338571758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135411289447.

The product of its (nonzero) digits is 169344000, while the sum is 65.

The spelling of 20853338571758 in words is "twenty trillion, eight hundred fifty-three billion, three hundred thirty-eight million, five hundred seventy-one thousand, seven hundred fifty-eight".