21268869413 has 8 divisors (see below), whose sum is σ = 23225410560. Its totient is φ = 19316162880.

The previous prime is 21268869409. The next prime is 21268869463. The reversal of 21268869413 is 31496886212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21268869413 - 2² = 21268869409 is a prime.

It is a super-2 number, since 2×21268869413² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21268869463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947045 + ... + 969242.

It is an arithmetic number, because the mean of its divisors is an integer number (2903176320).

Almost surely, 2^21268869413 is an apocalyptic number.

It is an amenable number.

21268869413 is a deficient number, since it is larger than the sum of its proper divisors (1956541147).

21268869413 is a wasteful number, since it uses less digits than its factorization.

21268869413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917307.

The product of its digits is 995328, while the sum is 50.

The spelling of 21268869413 in words is "twenty-one billion, two hundred sixty-eight million, eight hundred sixty-nine thousand, four hundred thirteen".