21074688000 has 384 divisors, whose sum is σ = 77936040000. Its totient is φ = 5618073600.

The previous prime is 21074687923. The next prime is 21074688013. The reversal of 21074688000 is 88647012.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6910476 + ... + 6913524.

Almost surely, 2^21074688000 is an apocalyptic number.

21074688000 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 21074688000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38968020000).

21074688000 is an abundant number, since it is smaller than the sum of its proper divisors (56861352000).

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

21074688000 is an equidigital number, since it uses as much as digits as its factorization.

21074688000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095 (or 3059 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 21074688000 in words is "twenty-one billion, seventy-four million, six hundred eighty-eight thousand".