21301541052 has 96 divisors (see below), whose sum is σ = 54903093504. Its totient is φ = 6374246400.

The previous prime is 21301540993. The next prime is 21301541153. The reversal of 21301541052 is 25014510312.

It is a happy number.

It is a congruent number.

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, 6694902 + ... + 6698082.

It is an arithmetic number, because the mean of its divisors is an integer number (571907224).

Almost surely, 2^21301541052 is an apocalyptic number.

21301541052 is a gapful number since it is divisible by the number (22) 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 21301541052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27451546752).

21301541052 is an abundant number, since it is smaller than the sum of its proper divisors (33601552452).

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

21301541052 is a wasteful number, since it uses less digits than its factorization.

21301541052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21301541052 in words is "twenty-one billion, three hundred one million, five hundred forty-one thousand, fifty-two".