21030430401 has 6 divisors (see below), whose sum is σ = 30377288370. Its totient is φ = 14020286928.

The previous prime is 21030430391. The next prime is 21030430403. The reversal of 21030430401 is 10403403012.

It can be written as a sum of positive squares in only one way, i.e., 20656588176 + 373842225 = 143724^2 + 19335^2 .

It is not a de Polignac number, because 21030430401 - 2¹⁴ = 21030414017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21030430403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1168357236 + ... + 1168357253.

It is an arithmetic number, because the mean of its divisors is an integer number (5062881395).

Almost surely, 2^21030430401 is an apocalyptic number.

It is an amenable number.

21030430401 is a deficient number, since it is larger than the sum of its proper divisors (9346857969).

21030430401 is a wasteful number, since it uses less digits than its factorization.

21030430401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336714495 (or 2336714492 counting only the distinct ones).

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

Adding to 21030430401 its reverse (10403403012), we get a palindrome (31433833413).

The spelling of 21030430401 in words is "twenty-one billion, thirty million, four hundred thirty thousand, four hundred one".