21723730104 has 64 divisors (see below), whose sum is σ = 57856579200. Its totient is φ = 6777461376.

The previous prime is 21723730079. The next prime is 21723730129. The reversal of 21723730104 is 40103732712.

It is an interprime number because it is at equal distance from previous prime (21723730079) and next prime (21723730129).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 249139 + ... + 324834.

It is an arithmetic number, because the mean of its divisors is an integer number (904009050).

Almost surely, 2^21723730104 is an apocalyptic number.

21723730104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21723730104 is an abundant number, since it is smaller than the sum of its proper divisors (36132849096).

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

21723730104 is a wasteful number, since it uses less digits than its factorization.

21723730104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574084 (or 574080 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The spelling of 21723730104 in words is "twenty-one billion, seven hundred twenty-three million, seven hundred thirty thousand, one hundred four".