21243076732 has 48 divisors (see below), whose sum is σ = 38731230720. Its totient is φ = 10187235072.

The previous prime is 21243076717. The next prime is 21243076739. The reversal of 21243076732 is 23767034212.

It is a junction number, because it is equal to n+sod(n) for n = 21243076691 and 21243076700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243076739) 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, 3735163 + ... + 3740845.

It is an arithmetic number, because the mean of its divisors is an integer number (806900640).

Almost surely, 2^21243076732 is an apocalyptic number.

It is an amenable number.

21243076732 is a deficient number, since it is larger than the sum of its proper divisors (17488153988).

21243076732 is a wasteful number, since it uses less digits than its factorization.

21243076732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130 (or 6128 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 21243076732 in words is "twenty-one billion, two hundred forty-three million, seventy-six thousand, seven hundred thirty-two".