21551130246624 has 48 divisors (see below), whose sum is σ = 61714600254720. Its totient is φ = 6530645528960.

The previous prime is 21551130246553. The next prime is 21551130246641. The reversal of 21551130246624 is 42664203115512.

It is a tau number, because it is divible by the number of its divisors (48).

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, 10204132584 + ... + 10204134695.

It is an arithmetic number, because the mean of its divisors is an integer number (1285720838640).

Almost surely, 2^{21551130246624} is an apocalyptic number.

21551130246624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21551130246624 is an abundant number, since it is smaller than the sum of its proper divisors (40163470008096).

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

21551130246624 is a wasteful number, since it uses less digits than its factorization.

21551130246624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408267303 (or 20408267295 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 21551130246624 in words is "twenty-one trillion, five hundred fifty-one billion, one hundred thirty million, two hundred forty-six thousand, six hundred twenty-four".