21744097970 has 16 divisors (see below), whose sum is σ = 44730715968. Its totient is φ = 7455119280.

The previous prime is 21744097961. The next prime is 21744097981. The reversal of 21744097970 is 7979044712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155314916 + ... + 155315055.

It is an arithmetic number, because the mean of its divisors is an integer number (2795669748).

Almost surely, 2^21744097970 is an apocalyptic number.

21744097970 is an abundant number, since it is smaller than the sum of its proper divisors (22986617998).

21744097970 is a wasteful number, since it uses less digits than its factorization.

21744097970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310629985.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 21744097970 in words is "twenty-one billion, seven hundred forty-four million, ninety-seven thousand, nine hundred seventy".