21772748196 has 72 divisors (see below), whose sum is σ = 57343313664. Its totient is φ = 6957789120.

The previous prime is 21772748189. The next prime is 21772748201. The reversal of 21772748196 is 69184727712.

21772748196 is a `hidden beast` number, since 2 + 1 + 7 + 72 + 7 + 481 + 96 = 666.

It is a super-3 number, since 3×21772748196³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28246 + ... + 210578.

It is an arithmetic number, because the mean of its divisors is an integer number (796434912).

Almost surely, 2^21772748196 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 21772748196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28671656832).

21772748196 is an abundant number, since it is smaller than the sum of its proper divisors (35570565468).

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

21772748196 is a wasteful number, since it uses less digits than its factorization.

21772748196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182481 (or 182476 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 21772748196 in words is "twenty-one billion, seven hundred seventy-two million, seven hundred forty-eight thousand, one hundred ninety-six".