21253693199560 has 32 divisors (see below), whose sum is σ = 47822342924160. Its totient is φ = 8501204706496.

The previous prime is 21253693199549. The next prime is 21253693199591. The reversal of 21253693199560 is 6599139635212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7252414 + ... + 9752173.

It is an arithmetic number, because the mean of its divisors is an integer number (1494448216380).

Almost surely, 2^{21253693199560} is an apocalyptic number.

21253693199560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21253693199560 is an abundant number, since it is smaller than the sum of its proper divisors (26568649724600).

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

21253693199560 is a wasteful number, since it uses less digits than its factorization.

21253693199560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035845 (or 17035841 counting only the distinct ones).

The product of its (nonzero) digits is 23619600, while the sum is 61.

The spelling of 21253693199560 in words is "twenty-one trillion, two hundred fifty-three billion, six hundred ninety-three million, one hundred ninety-nine thousand, five hundred sixty".