20858234850 has 72 divisors (see below), whose sum is σ = 56057640132. Its totient is φ = 5560358400.

The previous prime is 20858234809. The next prime is 20858234851. The reversal of 20858234850 is 5843285802.

20858234850 is a `hidden beast` number, since 20 + 8 + 582 + 3 + 48 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3697929 + 20854536921 = 1923^2 + 144411^2 .

It is a super-2 number, since 2×20858234850² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 20858234796 and 20858234805.

It is not an unprimeable number, because it can be changed into a prime (20858234851) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1863270 + ... + 1874430.

Almost surely, 2^20858234850 is an apocalyptic number.

20858234850 is an abundant number, since it is smaller than the sum of its proper divisors (35199405282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20858234850 is a wasteful number, since it uses less digits than its factorization.

20858234850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15332 (or 15324 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 20858234850 in words is "twenty billion, eight hundred fifty-eight million, two hundred thirty-four thousand, eight hundred fifty".