21842845412 has 6 divisors (see below), whose sum is σ = 38224979478. Its totient is φ = 10921422704.

The previous prime is 21842845399. The next prime is 21842845441. The reversal of 21842845412 is 21454824812.

It can be written as a sum of positive squares in only one way, i.e., 12237669376 + 9605176036 = 110624^2 + 98006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21842845412.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2730355673 + ... + 2730355680.

It is an arithmetic number, because the mean of its divisors is an integer number (6370829913).

Almost surely, 2^21842845412 is an apocalyptic number.

It is an amenable number.

21842845412 is a deficient number, since it is larger than the sum of its proper divisors (16382134066).

21842845412 is a wasteful number, since it uses less digits than its factorization.

21842845412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460711357 (or 5460711355 counting only the distinct ones).

The product of its digits is 163840, while the sum is 41.

The spelling of 21842845412 in words is "twenty-one billion, eight hundred forty-two million, eight hundred forty-five thousand, four hundred twelve".