21717673370 has 16 divisors (see below), whose sum is σ = 39457158048. Its totient is φ = 8605881360.

The previous prime is 21717673361. The next prime is 21717673421. The reversal of 21717673370 is 7337671712.

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, 10147376 + ... + 10149515.

It is an arithmetic number, because the mean of its divisors is an integer number (2466072378).

Almost surely, 2^21717673370 is an apocalyptic number.

21717673370 is a deficient number, since it is larger than the sum of its proper divisors (17739484678).

21717673370 is a wasteful number, since it uses less digits than its factorization.

21717673370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20297005.

The product of its (nonzero) digits is 259308, while the sum is 44.

The spelling of 21717673370 in words is "twenty-one billion, seven hundred seventeen million, six hundred seventy-three thousand, three hundred seventy".