21015052960 has 96 divisors (see below), whose sum is σ = 54641345472. Its totient is φ = 7574138880.

The previous prime is 21015052957. The next prime is 21015052963. The reversal of 21015052960 is 6925051012.

It is an interprime number because it is at equal distance from previous prime (21015052957) and next prime (21015052963).

It is not an unprimeable number, because it can be changed into a prime (21015052963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146047 + ... + 251713.

It is an arithmetic number, because the mean of its divisors is an integer number (569180682).

Almost surely, 2^21015052960 is an apocalyptic number.

21015052960 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 21015052960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27320672736).

21015052960 is an abundant number, since it is smaller than the sum of its proper divisors (33626292512).

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

21015052960 is a wasteful number, since it uses less digits than its factorization.

21015052960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105806 (or 105798 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 21015052960 in words is "twenty-one billion, fifteen million, fifty-two thousand, nine hundred sixty".