20343111200421 has 16 divisors (see below), whose sum is σ = 27129014996928. Its totient is φ = 13559641027200.

The previous prime is 20343111200417. The next prime is 20343111200429. The reversal of 20343111200421 is 12400211134302.

It is not a de Polignac number, because 20343111200421 - 2² = 20343111200417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20343111200391 and 20343111200400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343111200429) 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, 563019526 + ... + 563055656.

It is an arithmetic number, because the mean of its divisors is an integer number (1695563437308).

Almost surely, 2^{20343111200421} is an apocalyptic number.

It is an amenable number.

20343111200421 is a deficient number, since it is larger than the sum of its proper divisors (6785903796507).

20343111200421 is a wasteful number, since it uses less digits than its factorization.

20343111200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64612.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20343111200421 its reverse (12400211134302), we get a palindrome (32743322334723).

The spelling of 20343111200421 in words is "twenty trillion, three hundred forty-three billion, one hundred eleven million, two hundred thousand, four hundred twenty-one".