21065417474 has 16 divisors (see below), whose sum is σ = 32922892800. Its totient is φ = 10096346064.

The previous prime is 21065417473. The next prime is 21065417489. The reversal of 21065417474 is 47471456012.

It is not an unprimeable number, because it can be changed into a prime (21065417473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298402 + ... + 1314525.

It is an arithmetic number, because the mean of its divisors is an integer number (2057680800).

Almost surely, 2^21065417474 is an apocalyptic number.

21065417474 is a deficient number, since it is larger than the sum of its proper divisors (11857475326).

21065417474 is a wasteful number, since it uses less digits than its factorization.

21065417474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613097.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 21065417474 in words is "twenty-one billion, sixty-five million, four hundred seventeen thousand, four hundred seventy-four".