21404401433232 has 20 divisors (see below), whose sum is σ = 55294703702640. Its totient is φ = 7134800477728.

The previous prime is 21404401433227. The next prime is 21404401433251. The reversal of 21404401433232 is 23233410440412.

It is a junction number, because it is equal to n+sod(n) for n = 21404401433193 and 21404401433202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222962514882 + ... + 222962514977.

It is an arithmetic number, because the mean of its divisors is an integer number (2764735185132).

Almost surely, 2^{21404401433232} is an apocalyptic number.

It is an amenable number.

21404401433232 is an abundant number, since it is smaller than the sum of its proper divisors (33890302269408).

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

21404401433232 is a wasteful number, since it uses less digits than its factorization.

21404401433232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445925029870 (or 445925029864 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21404401433232 its reverse (23233410440412), we get a palindrome (44637811873644).

The spelling of 21404401433232 in words is "twenty-one trillion, four hundred four billion, four hundred one million, four hundred thirty-three thousand, two hundred thirty-two".