21788748300 has 108 divisors (see below), whose sum is σ = 69294337448. Its totient is φ = 5282112000.

The previous prime is 21788748277. The next prime is 21788748301. The reversal of 21788748300 is 384788712.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21788748300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21788748301) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 263821 + ... + 336420.

Almost surely, 2^21788748300 is an apocalyptic number.

21788748300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21788748300 is an abundant number, since it is smaller than the sum of its proper divisors (47505589148).

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

21788748300 is a wasteful number, since it uses less digits than its factorization.

21788748300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600280 (or 600262 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 21788748300 in words is "twenty-one billion, seven hundred eighty-eight million, seven hundred forty-eight thousand, three hundred".