20898448451760 has 80 divisors (see below), whose sum is σ = 70674752954880. Its totient is φ = 5066290533120.

The previous prime is 20898448451689. The next prime is 20898448451767. The reversal of 20898448451760 is 6715484489802.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 20898448451691 and 20898448451700.

It is not an unprimeable number, because it can be changed into a prime (20898448451767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3958036840 + ... + 3958042119.

It is an arithmetic number, because the mean of its divisors is an integer number (883434411936).

Almost surely, 2^{20898448451760} is an apocalyptic number.

20898448451760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20898448451760 is an abundant number, since it is smaller than the sum of its proper divisors (49776304503120).

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

20898448451760 is a wasteful number, since it uses less digits than its factorization.

20898448451760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916078986 (or 7916078980 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 66.

The spelling of 20898448451760 in words is "twenty trillion, eight hundred ninety-eight billion, four hundred forty-eight million, four hundred fifty-one thousand, seven hundred sixty".