21001430403232 has 24 divisors (see below), whose sum is σ = 41347103900256. Its totient is φ = 10500578619072.

The previous prime is 21001430403211. The next prime is 21001430403251. The reversal of 21001430403232 is 23230403410012.

It is a super-2 number, since 2×21001430403232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21001430403197 and 21001430403206.

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, 1746628 + ... + 6712195.

It is an arithmetic number, because the mean of its divisors is an integer number (1722795995844).

Almost surely, 2^{21001430403232} is an apocalyptic number.

It is an amenable number.

21001430403232 is a deficient number, since it is larger than the sum of its proper divisors (20345673497024).

21001430403232 is an equidigital number, since it uses as much as digits as its factorization.

21001430403232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536420 (or 8536412 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21001430403232 its reverse (23230403410012), we get a palindrome (44231833813244).

The spelling of 21001430403232 in words is "twenty-one trillion, one billion, four hundred thirty million, four hundred three thousand, two hundred thirty-two".