21733932640 has 96 divisors (see below), whose sum is σ = 58708952064. Its totient is φ = 7448163840.

The previous prime is 21733932611. The next prime is 21733932643. The reversal of 21733932640 is 4623933712.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 21733932593 and 21733932602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21733932643) 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, 3929557 + ... + 3935083.

It is an arithmetic number, because the mean of its divisors is an integer number (611551584).

Almost surely, 2^21733932640 is an apocalyptic number.

21733932640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21733932640 is an abundant number, since it is smaller than the sum of its proper divisors (36975019424).

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

21733932640 is a wasteful number, since it uses less digits than its factorization.

21733932640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 40.

The spelling of 21733932640 in words is "twenty-one billion, seven hundred thirty-three million, nine hundred thirty-two thousand, six hundred forty".