20398696444 has 24 divisors (see below), whose sum is σ = 40828824288. Its totient is φ = 8735563200.

The previous prime is 20398696379. The next prime is 20398696453. The reversal of 20398696444 is 44469689302.

It is a super-2 number, since 2×20398696444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243559 + ... + 316414.

It is an arithmetic number, because the mean of its divisors is an integer number (1701201012).

Almost surely, 2^20398696444 is an apocalyptic number.

It is an amenable number.

20398696444 is an abundant number, since it is smaller than the sum of its proper divisors (20430127844).

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

20398696444 is a wasteful number, since it uses less digits than its factorization.

20398696444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561285 (or 561283 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 55.

The spelling of 20398696444 in words is "twenty billion, three hundred ninety-eight million, six hundred ninety-six thousand, four hundred forty-four".