21301011528 has 64 divisors (see below), whose sum is σ = 55602080640. Its totient is φ = 6787444224.

The previous prime is 21301011527. The next prime is 21301011593. The reversal of 21301011528 is 82511010312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21301011498 and 21301011507.

It is not an unprimeable number, because it can be changed into a prime (21301011527) 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, 956650 + ... + 978662.

It is an arithmetic number, because the mean of its divisors is an integer number (868782510).

Almost surely, 2^21301011528 is an apocalyptic number.

It is an amenable number.

21301011528 is an abundant number, since it is smaller than the sum of its proper divisors (34301069112).

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

21301011528 is a wasteful number, since it uses less digits than its factorization.

21301011528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23798 (or 23794 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The spelling of 21301011528 in words is "twenty-one billion, three hundred one million, eleven thousand, five hundred twenty-eight".