21035253012 has 24 divisors (see below), whose sum is σ = 49086438912. Its totient is φ = 7011153600.

The previous prime is 21035252983. The next prime is 21035253017.

It is a happy number.

21035253012 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035253017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85837 + ... + 222347.

It is an arithmetic number, because the mean of its divisors is an integer number (2045268288).

Almost surely, 2^21035253012 is an apocalyptic number.

It is an amenable number.

21035253012 is an abundant number, since it is smaller than the sum of its proper divisors (28051185900).

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

21035253012 is a wasteful number, since it uses less digits than its factorization.

21035253012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149359 (or 149357 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21035253012 in words is "twenty-one billion, thirty-five million, two hundred fifty-three thousand, twelve".