21438157585360 has 80 divisors (see below), whose sum is σ = 52931380656960. Its totient is φ = 8052040120320.

The previous prime is 21438157585343. The next prime is 21438157585457. The reversal of 21438157585360 is 6358575183412.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 21438157585295 and 21438157585304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62235546 + ... + 62579065.

It is an arithmetic number, because the mean of its divisors is an integer number (661642258212).

Almost surely, 2^{21438157585360} is an apocalyptic number.

21438157585360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21438157585360 is an abundant number, since it is smaller than the sum of its proper divisors (31493223071600).

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

21438157585360 is a wasteful number, since it uses less digits than its factorization.

21438157585360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124814756 (or 124814750 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 58.

The spelling of 21438157585360 in words is "twenty-one trillion, four hundred thirty-eight billion, one hundred fifty-seven million, five hundred eighty-five thousand, three hundred sixty".