20555556130464 has 96 divisors (see below), whose sum is σ = 53987892469056. Its totient is φ = 6848099973120.

The previous prime is 20555556130429. The next prime is 20555556130519. The reversal of 20555556130464 is 46403165555502.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20555556130464² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1826018724 + ... + 1826029980.

It is an arithmetic number, because the mean of its divisors is an integer number (562373879886).

Almost surely, 2^{20555556130464} is an apocalyptic number.

20555556130464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20555556130464 is an abundant number, since it is smaller than the sum of its proper divisors (33432336338592).

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

20555556130464 is a wasteful number, since it uses less digits than its factorization.

20555556130464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998 (or 19990 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 20555556130464 in words is "twenty trillion, five hundred fifty-five billion, five hundred fifty-six million, one hundred thirty thousand, four hundred sixty-four".