21731603096 has 96 divisors (see below), whose sum is σ = 51614982000. Its totient is φ = 8519019264.

The previous prime is 21731603093. The next prime is 21731603099. The reversal of 21731603096 is 69030613712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21731603093) and next prime (21731603099).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21731603093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165686 + ... + 266298.

Almost surely, 2^21731603096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21731603096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25807491000).

21731603096 is an abundant number, since it is smaller than the sum of its proper divisors (29883378904).

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

21731603096 is a wasteful number, since it uses less digits than its factorization.

21731603096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100681 (or 100670 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 21731603096 in words is "twenty-one billion, seven hundred thirty-one million, six hundred three thousand, ninety-six".