21033201420 has 384 divisors, whose sum is σ = 81871534080. Its totient is φ = 4355112960.

The previous prime is 21033201407. The next prime is 21033201451. The reversal of 21033201420 is 2410233012.

21033201420 is a `hidden beast` number, since 2 + 10 + 33 + 201 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21033201393 and 21033201402.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14677024 + ... + 14678456.

It is an arithmetic number, because the mean of its divisors is an integer number (213207120).

Almost surely, 2^21033201420 is an apocalyptic number.

21033201420 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 21033201420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40935767040).

21033201420 is an abundant number, since it is smaller than the sum of its proper divisors (60838332660).

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

21033201420 is a wasteful number, since it uses less digits than its factorization.

21033201420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21033201420 its reverse (2410233012), we get a palindrome (23443434432).

The spelling of 21033201420 in words is "twenty-one billion, thirty-three million, two hundred one thousand, four hundred twenty".