20876861850 has 96 divisors (see below), whose sum is σ = 56943855360. Its totient is φ = 5029559040.

The previous prime is 20876861839. The next prime is 20876861879. The reversal of 20876861850 is 5816867802.

It is a junction number, because it is equal to n+sod(n) for n = 20876861793 and 20876861802.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22245 + ... + 205544.

It is an arithmetic number, because the mean of its divisors is an integer number (593165160).

Almost surely, 2^20876861850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20876861850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28471927680).

20876861850 is an abundant number, since it is smaller than the sum of its proper divisors (36066993510).

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

20876861850 is a wasteful number, since it uses less digits than its factorization.

20876861850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227864 (or 227859 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 20876861850 in words is "twenty billion, eight hundred seventy-six million, eight hundred sixty-one thousand, eight hundred fifty".