20091331260 has 1152 divisors, whose sum is σ = 88088985600. Its totient is φ = 3695155200.

The previous prime is 20091331237. The next prime is 20091331313. The reversal of 20091331260 is 6213319002.

20091331260 is a `hidden beast` number, since 200 + 91 + 3 + 312 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 184324086 + ... + 184324194.

Almost surely, 2^20091331260 is an apocalyptic number.

20091331260 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 20091331260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44044492800).

20091331260 is an abundant number, since it is smaller than the sum of its proper divisors (67997654340).

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

20091331260 is a wasteful number, since it uses less digits than its factorization.

20091331260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 20091331260 in words is "twenty billion, ninety-one million, three hundred thirty-one thousand, two hundred sixty".