21203301408 has 192 divisors, whose sum is σ = 62914682880. Its totient is φ = 6212505600.

The previous prime is 21203301407. The next prime is 21203301451. The reversal of 21203301408 is 80410330212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21203301407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2196753 + ... + 2206383.

It is an arithmetic number, because the mean of its divisors is an integer number (327680640).

Almost surely, 2^21203301408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21203301408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31457341440).

21203301408 is an abundant number, since it is smaller than the sum of its proper divisors (41711381472).

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

21203301408 is a wasteful number, since it uses less digits than its factorization.

21203301408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751 (or 9743 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 21203301408 in words is "twenty-one billion, two hundred three million, three hundred one thousand, four hundred eight".