21152531410160 has 80 divisors (see below), whose sum is σ = 50341492197216. Its totient is φ = 8261265137664.

The previous prime is 21152531410141. The next prime is 21152531410249. The reversal of 21152531410160 is 6101413525112.

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

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, 8445752 + ... + 10660008.

Almost surely, 2^{21152531410160} is an apocalyptic number.

21152531410160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152531410160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25170746098608).

21152531410160 is an abundant number, since it is smaller than the sum of its proper divisors (29188960787056).

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

21152531410160 is a wasteful number, since it uses less digits than its factorization.

21152531410160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217090 (or 2217084 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 21152531410160 its reverse (6101413525112), we get a palindrome (27253944935272).

The spelling of 21152531410160 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred thirty-one million, four hundred ten thousand, one hundred sixty".