21552210337640 has 32 divisors (see below), whose sum is σ = 48945673954080. Its totient is φ = 8540315122752.

The previous prime is 21552210337639. The next prime is 21552210337681. The reversal of 21552210337640 is 4673301225512.

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, 2517777302 + ... + 2517785861.

It is an arithmetic number, because the mean of its divisors is an integer number (1529552311065).

Almost surely, 2^{21552210337640} is an apocalyptic number.

21552210337640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21552210337640 is an abundant number, since it is smaller than the sum of its proper divisors (27393463616440).

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

21552210337640 is a wasteful number, since it uses less digits than its factorization.

21552210337640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035563281 (or 5035563277 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 21552210337640 in words is "twenty-one trillion, five hundred fifty-two billion, two hundred ten million, three hundred thirty-seven thousand, six hundred forty".