20123997696 has 400 divisors, whose sum is σ = 67686524928. Its totient is φ = 5897318400.

The previous prime is 20123997689. The next prime is 20123997697. The reversal of 20123997696 is 69679932102.

It is a super-2 number, since 2×20123997696² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123997697) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14141241 + ... + 14142663.

Almost surely, 2^20123997696 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 20123997696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33843262464).

20123997696 is an abundant number, since it is smaller than the sum of its proper divisors (47562527232).

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

20123997696 is a wasteful number, since it uses less digits than its factorization.

20123997696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 20123997696 in words is "twenty billion, one hundred twenty-three million, nine hundred ninety-seven thousand, six hundred ninety-six".