21550331405152 has 24 divisors (see below), whose sum is σ = 46284234495912. Its totient is φ = 9795605184000.

The previous prime is 21550331405149. The next prime is 21550331405221. The reversal of 21550331405152 is 25150413305512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30611265849 + ... + 30611266552.

It is an arithmetic number, because the mean of its divisors is an integer number (1928509770663).

Almost surely, 2^{21550331405152} is an apocalyptic number.

21550331405152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21550331405152 is an abundant number, since it is smaller than the sum of its proper divisors (24733903090760).

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

21550331405152 is a wasteful number, since it uses less digits than its factorization.

21550331405152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61222532422 (or 61222532414 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 21550331405152 in words is "twenty-one trillion, five hundred fifty billion, three hundred thirty-one million, four hundred five thousand, one hundred fifty-two".