20263553516560 has 40 divisors (see below), whose sum is σ = 47118061315800. Its totient is φ = 8104509683712.

The previous prime is 20263553516537. The next prime is 20263553516593. The reversal of 20263553516560 is 6561535536202.

It can be written as a sum of positive squares in 4 ways, for example, as 2216418247696 + 18047135268864 = 1488764^2 + 4248192^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×20263553516560² (a number of 27 digits) contains 22 as substring.

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, 13529785 + ... + 14952664.

It is an arithmetic number, because the mean of its divisors is an integer number (1177951532895).

Almost surely, 2^{20263553516560} is an apocalyptic number.

20263553516560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20263553516560 is an abundant number, since it is smaller than the sum of its proper divisors (26854507799240).

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

20263553516560 is a wasteful number, since it uses less digits than its factorization.

20263553516560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28491355 (or 28491349 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 20263553516560 in words is "twenty trillion, two hundred sixty-three billion, five hundred fifty-three million, five hundred sixteen thousand, five hundred sixty".