21418788300 has 288 divisors, whose sum is σ = 77900347392. Its totient is φ = 4422712320.

The previous prime is 21418788299. The next prime is 21418788343. The reversal of 21418788300 is 388781412.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1274754 + ... + 1291446.

Almost surely, 2^21418788300 is an apocalyptic number.

21418788300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21418788300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38950173696).

21418788300 is an abundant number, since it is smaller than the sum of its proper divisors (56481559092).

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

21418788300 is a wasteful number, since it uses less digits than its factorization.

21418788300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16777 (or 16770 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 21418788300 in words is "twenty-one billion, four hundred eighteen million, seven hundred eighty-eight thousand, three hundred".