20495745536 has 40 divisors (see below), whose sum is σ = 46801677120. Its totient is φ = 8783889408.

The previous prime is 20495745499. The next prime is 20495745539. The reversal of 20495745536 is 63554759402.

It is not an unprimeable number, because it can be changed into a prime (20495745539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855756 + ... + 2862923.

It is an arithmetic number, because the mean of its divisors is an integer number (1170041928).

Almost surely, 2^20495745536 is an apocalyptic number.

It is an amenable number.

20495745536 is an abundant number, since it is smaller than the sum of its proper divisors (26305931584).

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

20495745536 is an frugal number, since it uses more digits than its factorization.

20495745536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718704 (or 5718688 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 20495745536 in words is "twenty billion, four hundred ninety-five million, seven hundred forty-five thousand, five hundred thirty-six".