20858733755 has 16 divisors (see below), whose sum is σ = 25726701600.
Its totient is φ = 16228988160.
The previous prime is 20858733737. The next prime is 20858733761. The reversal of 20858733755 is 55733785802.
It is not a de Polignac number, because 20858733755 - 210 = 20858732731 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 20858733697 and 20858733706.
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, 357065 + ... + 411354.
It is an arithmetic number, because the mean of its divisors is an integer number (1607918850).
Almost surely, 220858733755 is an apocalyptic number.
20858733755 is a deficient number, since it is larger than the sum of its proper divisors (4867967845).
20858733755 is an equidigital number, since it uses as much as digits as its factorization.
20858733755 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 768574.
The product of its (nonzero) digits is 7056000, while the sum is 53.
The spelling of 20858733755 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-three thousand, seven hundred fifty-five".