20975650080 has 288 divisors, whose sum is σ = 83002776192. Its totient is φ = 4358492160.

The previous prime is 20975650079. The next prime is 20975650081. The reversal of 20975650080 is 8005657902.

It is an interprime number because it is at equal distance from previous prime (20975650079) and next prime (20975650081).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20975650081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 380764 + ... + 432356.

It is an arithmetic number, because the mean of its divisors is an integer number (288204084).

Almost surely, 2^20975650080 is an apocalyptic number.

20975650080 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 20975650080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41501388096).

20975650080 is an abundant number, since it is smaller than the sum of its proper divisors (62027126112).

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

20975650080 is a wasteful number, since it uses less digits than its factorization.

20975650080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51640 (or 51621 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 20975650080 in words is "twenty billion, nine hundred seventy-five million, six hundred fifty thousand, eighty".