20239821696 has 96 divisors (see below), whose sum is σ = 55255760280. Its totient is φ = 6564096000.

The previous prime is 20239821683. The next prime is 20239821709. The reversal of 20239821696 is 69612893202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20239821683) and next prime (20239821709).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 506446 + ... + 544946.

Almost surely, 2^20239821696 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 20239821696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27627880140).

20239821696 is an abundant number, since it is smaller than the sum of its proper divisors (35015938584).

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

20239821696 is an equidigital number, since it uses as much as digits as its factorization.

20239821696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38592 (or 38543 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 20239821696 in words is "twenty billion, two hundred thirty-nine million, eight hundred twenty-one thousand, six hundred ninety-six".