20959465984 has 80 divisors (see below), whose sum is σ = 42645841920. Its totient is φ = 10289111040.

The previous prime is 20959465951. The next prime is 20959465987. The reversal of 20959465984 is 48956495902.

It is not an unprimeable number, because it can be changed into a prime (20959465987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7724212 + ... + 7726924.

It is an arithmetic number, because the mean of its divisors is an integer number (533073024).

Almost surely, 2^20959465984 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 20959465984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21322920960).

20959465984 is an abundant number, since it is smaller than the sum of its proper divisors (21686375936).

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

20959465984 is an equidigital number, since it uses as much as digits as its factorization.

20959465984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001 (or 2985 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 20959465984 in words is "twenty billion, nine hundred fifty-nine million, four hundred sixty-five thousand, nine hundred eighty-four".