20396086542 has 96 divisors (see below), whose sum is σ = 48983302368. Its totient is φ = 6093819648.

The previous prime is 20396086537. The next prime is 20396086547. The reversal of 20396086542 is 24568069302.

20396086542 is a `hidden beast` number, since 2 + 0 + 39 + 608 + 6 + 5 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20396086537) and next prime (20396086547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20396086547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1734868 + ... + 1746584.

It is an arithmetic number, because the mean of its divisors is an integer number (510242733).

Almost surely, 2^20396086542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20396086542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24491651184).

20396086542 is an abundant number, since it is smaller than the sum of its proper divisors (28587215826).

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

20396086542 is a wasteful number, since it uses less digits than its factorization.

20396086542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11954 (or 11951 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 20396086542 in words is "twenty billion, three hundred ninety-six million, eighty-six thousand, five hundred forty-two".