20421043214 has 32 divisors (see below), whose sum is σ = 36479739744. Its totient is φ = 8450887680.

The previous prime is 20421043211. The next prime is 20421043283. The reversal of 20421043214 is 41234012402.

It is a self number, because there is not a number n which added to its sum of digits gives 20421043214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421043211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468179 + ... + 509934.

It is an arithmetic number, because the mean of its divisors is an integer number (1139991867).

Almost surely, 2^20421043214 is an apocalyptic number.

20421043214 is a deficient number, since it is larger than the sum of its proper divisors (16058696530).

20421043214 is a wasteful number, since it uses less digits than its factorization.

20421043214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978212.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20421043214 its reverse (41234012402), we get a palindrome (61655055616).

The spelling of 20421043214 in words is "twenty billion, four hundred twenty-one million, forty-three thousand, two hundred fourteen".