20858136219 has 6 divisors (see below), whose sum is σ = 30128418996. Its totient is φ = 13905424140.

The previous prime is 20858136197. The next prime is 20858136227. The reversal of 20858136219 is 91263185802.

20858136219 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 8 + 13 + 621 + 9 = 666.

It is not a de Polignac number, because 20858136219 - 2¹⁵ = 20858103451 is a prime.

It is a super-2 number, since 2×20858136219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20858136259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1158785337 + ... + 1158785354.

It is an arithmetic number, because the mean of its divisors is an integer number (5021403166).

Almost surely, 2^20858136219 is an apocalyptic number.

20858136219 is a deficient number, since it is larger than the sum of its proper divisors (9270282777).

20858136219 is a wasteful number, since it uses less digits than its factorization.

20858136219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317570697 (or 2317570694 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 20858136219 in words is "twenty billion, eight hundred fifty-eight million, one hundred thirty-six thousand, two hundred nineteen".