21760606197 has 48 divisors (see below), whose sum is σ = 36124595520. Its totient is φ = 12483590400.

The previous prime is 21760606193. The next prime is 21760606253. The reversal of 21760606197 is 79160606712.

It is a happy number.

21760606197 is a `hidden beast` number, since 21 + 7 + 6 + 0 + 6 + 0 + 619 + 7 = 666.

It is not a de Polignac number, because 21760606197 - 2² = 21760606193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21760606193) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2593473 + ... + 2601849.

It is an arithmetic number, because the mean of its divisors is an integer number (752595740).

Almost surely, 2^21760606197 is an apocalyptic number.

It is an amenable number.

21760606197 is a deficient number, since it is larger than the sum of its proper divisors (14363989323).

21760606197 is a wasteful number, since it uses less digits than its factorization.

21760606197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9794 (or 9791 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 21760606197 in words is "twenty-one billion, seven hundred sixty million, six hundred six thousand, one hundred ninety-seven".