21488332197789 has 24 divisors (see below), whose sum is σ = 31282559886240. Its totient is φ = 14213366355552.

The previous prime is 21488332197769. The next prime is 21488332197793. The reversal of 21488332197789 is 98779123388412.

It is a happy number.

21488332197789 is a `hidden beast` number, since 2 + 1 + 488 + 33 + 21 + 97 + 7 + 8 + 9 = 666.

It is not a de Polignac number, because 21488332197789 - 2⁵ = 21488332197757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21488332197769) 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, 14341074 + ... + 15768419.

It is an arithmetic number, because the mean of its divisors is an integer number (1303439995260).

Almost surely, 2^{21488332197789} is an apocalyptic number.

It is an amenable number.

21488332197789 is a deficient number, since it is larger than the sum of its proper divisors (9794227688451).

21488332197789 is a wasteful number, since it uses less digits than its factorization.

21488332197789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30110121 (or 30110118 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The spelling of 21488332197789 in words is "twenty-one trillion, four hundred eighty-eight billion, three hundred thirty-two million, one hundred ninety-seven thousand, seven hundred eighty-nine".