20964147848 has 108 divisors (see below), whose sum is σ = 46833111495. Its totient is φ = 8772089760.

The previous prime is 20964147833. The next prime is 20964147881. The reversal of 20964147848 is 84874146902.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10482073924 + 10482073924 = 102382^2 + 102382^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=102382.

It is a super-2 number, since 2×20964147848² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20964147848.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 203535365 + ... + 203535467.

Almost surely, 2^20964147848 is an apocalyptic number.

20964147848 is a gapful number since it is divisible by the number (28) 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 20964147848

20964147848 is an abundant number, since it is smaller than the sum of its proper divisors (25868963647).

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

20964147848 is an equidigital number, since it uses as much as digits as its factorization.

20964147848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 20964147848 in words is "twenty billion, nine hundred sixty-four million, one hundred forty-seven thousand, eight hundred forty-eight".