21712002357 has 8 divisors (see below), whose sum is σ = 29040660576. Its totient is φ = 14429006192.

The previous prime is 21712002349. The next prime is 21712002371. The reversal of 21712002357 is 75320021712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21712002357 - 2³ = 21712002349 is a prime.

It is a super-2 number, since 2×21712002357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21712002157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11414403 + ... + 11416304.

It is an arithmetic number, because the mean of its divisors is an integer number (3630082572).

Almost surely, 2^21712002357 is an apocalyptic number.

It is an amenable number.

21712002357 is a deficient number, since it is larger than the sum of its proper divisors (7328658219).

21712002357 is a wasteful number, since it uses less digits than its factorization.

21712002357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831027.

The product of its (nonzero) digits is 5880, while the sum is 30.

The spelling of 21712002357 in words is "twenty-one billion, seven hundred twelve million, two thousand, three hundred fifty-seven".