21324500031 has 8 divisors (see below), whose sum is σ = 28489648000. Its totient is φ = 14187842712.

The previous prime is 21324500011. The next prime is 21324500059. The reversal of 21324500031 is 13000542312.

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

It is not a de Polignac number, because 21324500031 - 2²³ = 21316111423 is a prime.

It is a super-2 number, since 2×21324500031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21324499980 and 21324500007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324500011) 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, 7120915 + ... + 7123908.

It is an arithmetic number, because the mean of its divisors is an integer number (3561206000).

Almost surely, 2^21324500031 is an apocalyptic number.

21324500031 is a deficient number, since it is larger than the sum of its proper divisors (7165147969).

21324500031 is a wasteful number, since it uses less digits than its factorization.

21324500031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14245325.

The product of its (nonzero) digits is 720, while the sum is 21.

The spelling of 21324500031 in words is "twenty-one billion, three hundred twenty-four million, five hundred thousand, thirty-one".