20875493912 has 96 divisors (see below), whose sum is σ = 49767142320. Its totient is φ = 8135043840.

The previous prime is 20875493897. The next prime is 20875493917. The reversal of 20875493912 is 21939457802.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875493917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310862 + ... + 372002.

Almost surely, 2^20875493912 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 20875493912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24883571160).

20875493912 is an abundant number, since it is smaller than the sum of its proper divisors (28891648408).

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

20875493912 is a wasteful number, since it uses less digits than its factorization.

20875493912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61241 (or 61230 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 20875493912 in words is "twenty billion, eight hundred seventy-five million, four hundred ninety-three thousand, nine hundred twelve".