21101032413 has 20 divisors (see below), whose sum is σ = 31833399708. Its totient is φ = 13928068800.

The previous prime is 21101032409. The next prime is 21101032429. The reversal of 21101032413 is 31423010112.

21101032413 is a `hidden beast` number, since 211 + 0 + 10 + 32 + 413 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18485937369 + 2615095044 = 135963^2 + 51138^2 .

It is not a de Polignac number, because 21101032413 - 2² = 21101032409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101032493) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1281456 + ... + 1297817.

Almost surely, 2^21101032413 is an apocalyptic number.

It is an amenable number.

21101032413 is a deficient number, since it is larger than the sum of its proper divisors (10732367295).

21101032413 is a wasteful number, since it uses less digits than its factorization.

21101032413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579386 (or 2579377 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21101032413 its reverse (31423010112), we get a palindrome (52524042525).

The spelling of 21101032413 in words is "twenty-one billion, one hundred one million, thirty-two thousand, four hundred thirteen".