21337473732 has 96 divisors (see below), whose sum is σ = 51599624832. Its totient is φ = 6859247616.

The previous prime is 21337473709. The next prime is 21337473739. The reversal of 21337473732 is 23737473312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21337473739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9684543 + ... + 9686745.

It is an arithmetic number, because the mean of its divisors is an integer number (537496092).

Almost surely, 2^21337473732 is an apocalyptic number.

It is an amenable number.

21337473732 is an abundant number, since it is smaller than the sum of its proper divisors (30262151100).

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

21337473732 is a wasteful number, since it uses less digits than its factorization.

21337473732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517 (or 2515 counting only the distinct ones).

The product of its digits is 444528, while the sum is 42.

The spelling of 21337473732 in words is "twenty-one billion, three hundred thirty-seven million, four hundred seventy-three thousand, seven hundred thirty-two".