21877147248 has 40 divisors (see below), whose sum is σ = 61653780096. Its totient is φ = 6629438400.

The previous prime is 21877147241. The next prime is 21877147307. The reversal of 21877147248 is 84274177812.

It is a self number, because there is not a number n which added to its sum of digits gives 21877147248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21877147241) 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, 20716468 + ... + 20717523.

Almost surely, 2^21877147248 is an apocalyptic number.

It is an amenable number.

21877147248 is an abundant number, since it is smaller than the sum of its proper divisors (39776632848).

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

21877147248 is a wasteful number, since it uses less digits than its factorization.

21877147248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41434013 (or 41434007 counting only the distinct ones).

The product of its digits is 1404928, while the sum is 51.

The spelling of 21877147248 in words is "twenty-one billion, eight hundred seventy-seven million, one hundred forty-seven thousand, two hundred forty-eight".