21357694813411 has 6 divisors (see below), whose sum is σ = 23475813307436. Its totient is φ = 19416086193900.

The previous prime is 21357694813267. The next prime is 21357694813453. The reversal of 21357694813411 is 11431849675312.

It is a happy number.

It is not a de Polignac number, because 21357694813411 - 2¹⁷ = 21357694682339 is a prime.

It is a super-2 number, since 2×21357694813411² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21357694813211) 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, 88254937125 + ... + 88254937366.

Almost surely, 2^{21357694813411} is an apocalyptic number.

21357694813411 is a deficient number, since it is larger than the sum of its proper divisors (2118118494025).

21357694813411 is a wasteful number, since it uses less digits than its factorization.

21357694813411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176509874513 (or 176509874502 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The spelling of 21357694813411 in words is "twenty-one trillion, three hundred fifty-seven billion, six hundred ninety-four million, eight hundred thirteen thousand, four hundred eleven".