20105425676 has 72 divisors (see below), whose sum is σ = 41367879168. Its totient is φ = 8375414400.

The previous prime is 20105425667. The next prime is 20105425709. The reversal of 20105425676 is 67652450102.

It is a super-2 number, since 2×20105425676² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16331981 + ... + 16333211.

Almost surely, 2^20105425676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20105425676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20683939584).

20105425676 is an abundant number, since it is smaller than the sum of its proper divisors (21262453492).

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

20105425676 is a wasteful number, since it uses less digits than its factorization.

20105425676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

Adding to 20105425676 its reverse (67652450102), we get a palindrome (87757875778).

The spelling of 20105425676 in words is "twenty billion, one hundred five million, four hundred twenty-five thousand, six hundred seventy-six".