21002113414 has 4 divisors (see below), whose sum is σ = 31503170124. Its totient is φ = 10501056706.

The previous prime is 21002113397. The next prime is 21002113427. The reversal of 21002113414 is 41431120012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21002113391 and 21002113400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250528352 + ... + 5250528355.

It is an arithmetic number, because the mean of its divisors is an integer number (7875792531).

Almost surely, 2^21002113414 is an apocalyptic number.

21002113414 is a deficient number, since it is larger than the sum of its proper divisors (10501056710).

21002113414 is a wasteful number, since it uses less digits than its factorization.

21002113414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501056709.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21002113414 its reverse (41431120012), we get a palindrome (62433233426).

The spelling of 21002113414 in words is "twenty-one billion, two million, one hundred thirteen thousand, four hundred fourteen".