21154532253000 has 128 divisors (see below), whose sum is σ = 66004617744000. Its totient is φ = 5640996883200.

The previous prime is 21154532252939. The next prime is 21154532253017. The reversal of 21154532253000 is 35223545112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90059706 + ... + 90294294.

It is an arithmetic number, because the mean of its divisors is an integer number (515661076125).

Almost surely, 2^{21154532253000} is an apocalyptic number.

21154532253000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21154532253000 is an abundant number, since it is smaller than the sum of its proper divisors (44850085491000).

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

21154532253000 is a wasteful number, since it uses less digits than its factorization.

21154532253000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264672 (or 264658 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 21154532253000 its reverse (35223545112), we get a palindrome (21189755798112).

The spelling of 21154532253000 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred thirty-two million, two hundred fifty-three thousand".