20239392768 has 224 divisors, whose sum is σ = 62963145600. Its totient is φ = 5782683648.

The previous prime is 20239392751. The next prime is 20239392769. The reversal of 20239392768 is 86729393202.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-3 number, since 3×20239392768³ (a number of 32 digits) contains 333 as substring.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 20239392768.

It is not an unprimeable number, because it can be changed into a prime (20239392769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2891341821 + ... + 2891341827.

Almost surely, 2^20239392768 is an apocalyptic number.

20239392768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20239392768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31481572800).

20239392768 is an abundant number, since it is smaller than the sum of its proper divisors (42723752832).

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

20239392768 is an frugal number, since it uses more digits than its factorization.

20239392768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 20239392768 in words is "twenty billion, two hundred thirty-nine million, three hundred ninety-two thousand, seven hundred sixty-eight".