21707233532 has 24 divisors (see below), whose sum is σ = 39194366400. Its totient is φ = 10514028096.

The previous prime is 21707233531. The next prime is 21707233553. The reversal of 21707233532 is 23533270712.

It is a super-2 number, since 2×21707233532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21707233492 and 21707233501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21707233531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631307 + ... + 664802.

It is an arithmetic number, because the mean of its divisors is an integer number (1633098600).

Almost surely, 2^21707233532 is an apocalyptic number.

It is an amenable number.

21707233532 is a deficient number, since it is larger than the sum of its proper divisors (17487132868).

21707233532 is a wasteful number, since it uses less digits than its factorization.

21707233532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296245 (or 1296243 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 35.

The spelling of 21707233532 in words is "twenty-one billion, seven hundred seven million, two hundred thirty-three thousand, five hundred thirty-two".