21887827604 has 24 divisors (see below), whose sum is σ = 39644156160. Its totient is φ = 10561300064.

The previous prime is 21887827603. The next prime is 21887827627. The reversal of 21887827604 is 40672878812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21887827603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193577 + ... + 285039.

It is an arithmetic number, because the mean of its divisors is an integer number (1651839840).

Almost surely, 2^21887827604 is an apocalyptic number.

It is an amenable number.

21887827604 is a deficient number, since it is larger than the sum of its proper divisors (17756328556).

21887827604 is a wasteful number, since it uses less digits than its factorization.

21887827604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93559 (or 93557 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 21887827604 in words is "twenty-one billion, eight hundred eighty-seven million, eight hundred twenty-seven thousand, six hundred four".