21569600969 has 8 divisors (see below), whose sum is σ = 26101029888. Its totient is φ = 17400686400.

The previous prime is 21569600957. The next prime is 21569601017. The reversal of 21569600969 is 96900696512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21569600969 - 2⁴ = 21569600953 is a prime.

It is a super-2 number, since 2×21569600969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21569600969.

It is not an unprimeable number, because it can be changed into a prime (21569600909) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 90628457 + ... + 90628694.

It is an arithmetic number, because the mean of its divisors is an integer number (3262628736).

Almost surely, 2^21569600969 is an apocalyptic number.

It is an amenable number.

21569600969 is a deficient number, since it is larger than the sum of its proper divisors (4531428919).

21569600969 is a wasteful number, since it uses less digits than its factorization.

21569600969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181257175.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 21569600969 in words is "twenty-one billion, five hundred sixty-nine million, six hundred thousand, nine hundred sixty-nine".