21657353530412 has 24 divisors (see below), whose sum is σ = 37918195988400. Its totient is φ = 10823583981056.

The previous prime is 21657353530387. The next prime is 21657353530429. The reversal of 21657353530412 is 21403535375612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128581283 + ... + 128749605.

It is an arithmetic number, because the mean of its divisors is an integer number (1579924832850).

Almost surely, 2^{21657353530412} is an apocalyptic number.

It is an amenable number.

21657353530412 is a deficient number, since it is larger than the sum of its proper divisors (16260842457988).

21657353530412 is a wasteful number, since it uses less digits than its factorization.

21657353530412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183265 (or 183263 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 47.

The spelling of 21657353530412 in words is "twenty-one trillion, six hundred fifty-seven billion, three hundred fifty-three million, five hundred thirty thousand, four hundred twelve".