20795957985 has 16 divisors (see below), whose sum is σ = 36298399680. Its totient is φ = 10082888640.

The previous prime is 20795957983. The next prime is 20795957989. The reversal of 20795957985 is 58975959702.

It is not a de Polignac number, because 20795957985 - 2¹ = 20795957983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20795957983) 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, 63017890 + ... + 63018219.

It is an arithmetic number, because the mean of its divisors is an integer number (2268649980).

Almost surely, 2^20795957985 is an apocalyptic number.

It is an amenable number.

20795957985 is a deficient number, since it is larger than the sum of its proper divisors (15502441695).

20795957985 is a wasteful number, since it uses less digits than its factorization.

20795957985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126036128.

The product of its (nonzero) digits is 71442000, while the sum is 66.

The spelling of 20795957985 in words is "twenty billion, seven hundred ninety-five million, nine hundred fifty-seven thousand, nine hundred eighty-five".