20395869312 has 128 divisors (see below), whose sum is σ = 66678917760. Its totient is φ = 5379121152.

The previous prime is 20395869287. The next prime is 20395869313. The reversal of 20395869312 is 21396859302.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20395869313) 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, 256893 + ... + 326780.

It is an arithmetic number, because the mean of its divisors is an integer number (520929045).

Almost surely, 2^20395869312 is an apocalyptic number.

It is an amenable number.

20395869312 is an abundant number, since it is smaller than the sum of its proper divisors (46283048448).

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

20395869312 is a wasteful number, since it uses less digits than its factorization.

20395869312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583710 (or 583698 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 20395869312 in words is "twenty billion, three hundred ninety-five million, eight hundred sixty-nine thousand, three hundred twelve".