21371194548 has 60 divisors (see below), whose sum is σ = 60947490912. Its totient is φ = 6476118480.

The previous prime is 21371194541. The next prime is 21371194553. The reversal of 21371194548 is 84549117312.

21371194548 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 11 + 94 + 548 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21371194541) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2994640 + ... + 3001767.

Almost surely, 2^21371194548 is an apocalyptic number.

It is an amenable number.

21371194548 is an abundant number, since it is smaller than the sum of its proper divisors (39576296364).

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

21371194548 is a wasteful number, since it uses less digits than its factorization.

21371194548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996434 (or 5996423 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The spelling of 21371194548 in words is "twenty-one billion, three hundred seventy-one million, one hundred ninety-four thousand, five hundred forty-eight".