20396019996 has 120 divisors (see below), whose sum is σ = 58820897520. Its totient is φ = 6111072000.

The previous prime is 20396019989. The next prime is 20396019997. The reversal of 20396019996 is 69991069302.

20396019996 is a `hidden beast` number, since 20 + 3 + 9 + 601 + 9 + 9 + 9 + 6 = 666.

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 (20396019997) 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, 285046 + ... + 349346.

It is an arithmetic number, because the mean of its divisors is an integer number (490174146).

Almost surely, 2^20396019996 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 20396019996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410448760).

20396019996 is an abundant number, since it is smaller than the sum of its proper divisors (38424877524).

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

20396019996 is a wasteful number, since it uses less digits than its factorization.

20396019996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64417 (or 64406 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The spelling of 20396019996 in words is "twenty billion, three hundred ninety-six million, nineteen thousand, nine hundred ninety-six".