21469871270 has 16 divisors (see below), whose sum is σ = 38689550640. Its totient is φ = 8578219104.

The previous prime is 21469871243. The next prime is 21469871287. The reversal of 21469871270 is 7217896412.

It is a Curzon number.

It is a congruent number.

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, 1206905 + ... + 1224564.

It is an arithmetic number, because the mean of its divisors is an integer number (2418096915).

Almost surely, 2^21469871270 is an apocalyptic number.

21469871270 is a deficient number, since it is larger than the sum of its proper divisors (17219679370).

21469871270 is a wasteful number, since it uses less digits than its factorization.

21469871270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432359.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 21469871270 in words is "twenty-one billion, four hundred sixty-nine million, eight hundred seventy-one thousand, two hundred seventy".