21214063430426 has 4 divisors (see below), whose sum is σ = 31821095145642. Its totient is φ = 10607031715212.

The previous prime is 21214063430423. The next prime is 21214063430509. The reversal of 21214063430426 is 62403436041212.

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

It can be written as a sum of positive squares in only one way, i.e., 18298674513025 + 2915388917401 = 4277695^2 + 1707451^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21214063430426.

It is not an unprimeable number, because it can be changed into a prime (21214063430423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303515857605 + ... + 5303515857608.

Almost surely, 2^{21214063430426} is an apocalyptic number.

21214063430426 is a deficient number, since it is larger than the sum of its proper divisors (10607031715216).

21214063430426 is a wasteful number, since it uses less digits than its factorization.

21214063430426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10607031715215.

The product of its (nonzero) digits is 165888, while the sum is 38.

Adding to 21214063430426 its reverse (62403436041212), we get a palindrome (83617499471638).

The spelling of 21214063430426 in words is "twenty-one trillion, two hundred fourteen billion, sixty-three million, four hundred thirty thousand, four hundred twenty-six".