21428064195 has 64 divisors (see below), whose sum is σ = 36104140800. Its totient is φ = 10831518720.

The previous prime is 21428064181. The next prime is 21428064209. The reversal of 21428064195 is 59146082412.

It is an interprime number because it is at equal distance from previous prime (21428064181) and next prime (21428064209).

It is not a de Polignac number, because 21428064195 - 2¹⁴ = 21428047811 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25539586 + ... + 25540424.

It is an arithmetic number, because the mean of its divisors is an integer number (564127200).

Almost surely, 2^21428064195 is an apocalyptic number.

21428064195 is a deficient number, since it is larger than the sum of its proper divisors (14676076605).

21428064195 is a wasteful number, since it uses less digits than its factorization.

21428064195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 21428064195 in words is "twenty-one billion, four hundred twenty-eight million, sixty-four thousand, one hundred ninety-five".