21827077804 has 24 divisors (see below), whose sum is σ = 45062355968. Its totient is φ = 9052704720.

The previous prime is 21827077793. The next prime is 21827077807. The reversal of 21827077804 is 40877072812.

It is not an unprimeable number, because it can be changed into a prime (21827077807) 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, 12572334 + ... + 12574069.

Almost surely, 2^21827077804 is an apocalyptic number.

It is an amenable number.

21827077804 is an abundant number, since it is smaller than the sum of its proper divisors (23235278164).

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

21827077804 is a wasteful number, since it uses less digits than its factorization.

21827077804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25146445 (or 25146443 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 46.

The spelling of 21827077804 in words is "twenty-one billion, eight hundred twenty-seven million, seventy-seven thousand, eight hundred four".