21569468044 has 12 divisors (see below), whose sum is σ = 38549687904. Its totient is φ = 10555271504.

The previous prime is 21569468023. The next prime is 21569468051. The reversal of 21569468044 is 44086496512.

It is a super-2 number, since 2×21569468044² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57365419 + ... + 57365794.

It is an arithmetic number, because the mean of its divisors is an integer number (3212473992).

Almost surely, 2^21569468044 is an apocalyptic number.

It is an amenable number.

21569468044 is a deficient number, since it is larger than the sum of its proper divisors (16980219860).

21569468044 is a wasteful number, since it uses less digits than its factorization.

21569468044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114731264 (or 114731262 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 21569468044 in words is "twenty-one billion, five hundred sixty-nine million, four hundred sixty-eight thousand, forty-four".