20672686080 has 192 divisors, whose sum is σ = 73485921600. Its totient is φ = 5512642560.

The previous prime is 20672686079. The next prime is 20672686087. The reversal of 20672686080 is 8068627602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672686087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239095 + ... + 313865.

It is an arithmetic number, because the mean of its divisors is an integer number (382739175).

Almost surely, 2^20672686080 is an apocalyptic number.

20672686080 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 20672686080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36742960800).

20672686080 is an abundant number, since it is smaller than the sum of its proper divisors (52813235520).

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

20672686080 is an equidigital number, since it uses as much as digits as its factorization.

20672686080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74807 (or 74781 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20672686080 in words is "twenty billion, six hundred seventy-two million, six hundred eighty-six thousand, eighty".