20641791360 has 256 divisors, whose sum is σ = 67186584000. Its totient is φ = 5389418496.

The previous prime is 20641791343. The next prime is 20641791371. The reversal of 20641791360 is 6319714602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19308906 + ... + 19309974.

Almost surely, 2^20641791360 is an apocalyptic number.

20641791360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20641791360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33593292000).

20641791360 is an abundant number, since it is smaller than the sum of its proper divisors (46544792640).

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

20641791360 is a wasteful number, since it uses less digits than its factorization.

20641791360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 20641791360 in words is "twenty billion, six hundred forty-one million, seven hundred ninety-one thousand, three hundred sixty".