21373471645532 has 24 divisors (see below), whose sum is σ = 37488990327600. Its totient is φ = 10662332818176.

The previous prime is 21373471645499. The next prime is 21373471645553. The reversal of 21373471645532 is 23554617437312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78521444 + ... + 78793172.

It is an arithmetic number, because the mean of its divisors is an integer number (1562041263650).

Almost surely, 2^{21373471645532} is an apocalyptic number.

It is an amenable number.

21373471645532 is a deficient number, since it is larger than the sum of its proper divisors (16115518682068).

21373471645532 is a wasteful number, since it uses less digits than its factorization.

21373471645532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316565 (or 316563 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 53.

The spelling of 21373471645532 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred seventy-one million, six hundred forty-five thousand, five hundred thirty-two".