21465171346 has 32 divisors (see below), whose sum is σ = 34533604800. Its totient is φ = 9971014656.

The previous prime is 21465171313. The next prime is 21465171353. The reversal of 21465171346 is 64317156412.

It is a junction number, because it is equal to n+sod(n) for n = 21465171299 and 21465171308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019130 + ... + 1039978.

It is an arithmetic number, because the mean of its divisors is an integer number (1079175150).

Almost surely, 2^21465171346 is an apocalyptic number.

21465171346 is a deficient number, since it is larger than the sum of its proper divisors (13068433454).

21465171346 is a wasteful number, since it uses less digits than its factorization.

21465171346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21258.

The product of its digits is 120960, while the sum is 40.

The spelling of 21465171346 in words is "twenty-one billion, four hundred sixty-five million, one hundred seventy-one thousand, three hundred forty-six".