20091907011672 has 768 divisors, whose sum is σ = 61463828160000. Its totient is φ = 6138485876736.

The previous prime is 20091907011607. The next prime is 20091907011679. The reversal of 20091907011672 is 27611070919002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091907011679) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 112245290479 + ... + 112245290657.

It is an arithmetic number, because the mean of its divisors is an integer number (80031026250).

Almost surely, 2^{20091907011672} 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 20091907011672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30731914080000).

20091907011672 is an abundant number, since it is smaller than the sum of its proper divisors (41371921148328).

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

20091907011672 is an equidigital number, since it uses as much as digits as its factorization.

20091907011672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The spelling of 20091907011672 in words is "twenty trillion, ninety-one billion, nine hundred seven million, eleven thousand, six hundred seventy-two".