20666962080 has 240 divisors, whose sum is σ = 73274471424. Its totient is φ = 5485708800.

The previous prime is 20666962079. The next prime is 20666962081. The reversal of 20666962080 is 8026966602.

It is an interprime number because it is at equal distance from previous prime (20666962079) and next prime (20666962081).

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (20666962081) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2886505 + ... + 2893655.

Almost surely, 2^20666962080 is an apocalyptic number.

20666962080 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 20666962080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36637235712).

20666962080 is an abundant number, since it is smaller than the sum of its proper divisors (52607509344).

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

20666962080 is a wasteful number, since it uses less digits than its factorization.

20666962080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7401 (or 7384 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20666962080 in words is "twenty billion, six hundred sixty-six million, nine hundred sixty-two thousand, eighty".