21401451430013 has 32 divisors (see below), whose sum is σ = 23287318602240. Its totient is φ = 19601292513600.

The previous prime is 21401451429991. The next prime is 21401451430019. The reversal of 21401451430013 is 31003415410412.

It is not a de Polignac number, because 21401451430013 - 2¹⁸ = 21401451167869 is a prime.

It is a super-2 number, since 2×21401451430013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401451430019) 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, 272844506 + ... + 272922932.

It is an arithmetic number, because the mean of its divisors is an integer number (727728706320).

Almost surely, 2^{21401451430013} is an apocalyptic number.

It is an amenable number.

21401451430013 is a deficient number, since it is larger than the sum of its proper divisors (1885867172227).

21401451430013 is a wasteful number, since it uses less digits than its factorization.

21401451430013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81897.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21401451430013 its reverse (31003415410412), we get a palindrome (52404866840425).

The spelling of 21401451430013 in words is "twenty-one trillion, four hundred one billion, four hundred fifty-one million, four hundred thirty thousand, thirteen".