20996449344 has 140 divisors (see below), whose sum is σ = 67027965004. Its totient is φ = 6460425216.

The previous prime is 20996449321. The next prime is 20996449351. The reversal of 20996449344 is 44394469902.

It is a happy number.

20996449344 is a `hidden beast` number, since 2 + 0 + 99 + 64 + 493 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1866240000 + 19130209344 = 43200^2 + 138312^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 88387 + ... + 223170.

Almost surely, 2^20996449344 is an apocalyptic number.

20996449344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20996449344 is an abundant number, since it is smaller than the sum of its proper divisors (46031515660).

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

20996449344 is a wasteful number, since it uses less digits than its factorization.

20996449344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311594 (or 311575 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 20996449344 in words is "twenty billion, nine hundred ninety-six million, four hundred forty-nine thousand, three hundred forty-four".