21845104812 has 60 divisors (see below), whose sum is σ = 57148756896. Its totient is φ = 7276430880.

The previous prime is 21845104811. The next prime is 21845104849. The reversal of 21845104812 is 21840154812.

21845104812 is a `hidden beast` number, since 21 + 84 + 510 + 48 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21845104811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 437362 + ... + 484742.

Almost surely, 2^21845104812 is an apocalyptic number.

It is an amenable number.

21845104812 is an abundant number, since it is smaller than the sum of its proper divisors (35303652084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21845104812 is a wasteful number, since it uses less digits than its factorization.

21845104812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48820 (or 48809 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The spelling of 21845104812 in words is "twenty-one billion, eight hundred forty-five million, one hundred four thousand, eight hundred twelve".