20681307174 has 48 divisors (see below), whose sum is σ = 45655303680. Its totient is φ = 6240788400.

The previous prime is 20681307161. The next prime is 20681307197. The reversal of 20681307174 is 47170318602.

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, 113919 + ... + 233109.

It is an arithmetic number, because the mean of its divisors is an integer number (951152160).

Almost surely, 2^20681307174 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20681307174, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22827651840).

20681307174 is an abundant number, since it is smaller than the sum of its proper divisors (24973996506).

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

20681307174 is a wasteful number, since it uses less digits than its factorization.

20681307174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119457 (or 119446 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 20681307174 in words is "twenty billion, six hundred eighty-one million, three hundred seven thousand, one hundred seventy-four".