13021547628 has 48 divisors (see below), whose sum is σ = 32368129920. Its totient is φ = 4062518784.

The previous prime is 13021547621. The next prime is 13021547633. The reversal of 13021547628 is 82674512031.

It is a super-3 number, since 3×13021547628³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13021547621) 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, 325125 + ... + 362972.

It is an arithmetic number, because the mean of its divisors is an integer number (674336040).

Almost surely, 2^13021547628 is an apocalyptic number.

It is an amenable number.

13021547628 is an abundant number, since it is smaller than the sum of its proper divisors (19346582292).

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

13021547628 is a wasteful number, since it uses less digits than its factorization.

13021547628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688206 (or 688204 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 13021547628 in words is "thirteen billion, twenty-one million, five hundred forty-seven thousand, six hundred twenty-eight".