21375171633700 has 36 divisors (see below), whose sum is σ = 46386896768212. Its totient is φ = 8549557257600.

The previous prime is 21375171633643. The next prime is 21375171633721. The reversal of 21375171633700 is 733617157312.

It can be written as a sum of positive squares in 6 ways, for example, as 209872101924 + 21165299531776 = 458118^2 + 4600576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4709979 + ... + 8058178.

Almost surely, 2^{21375171633700} is an apocalyptic number.

21375171633700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21375171633700 is an abundant number, since it is smaller than the sum of its proper divisors (25011725134512).

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

21375171633700 is a wasteful number, since it uses less digits than its factorization.

21375171633700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784912 (or 12784905 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 46.

The spelling of 21375171633700 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred seventy-one million, six hundred thirty-three thousand, seven hundred".