20414421 has 6 divisors (see below), whose sum is σ = 29487510. Its totient is φ = 13609608.

The previous prime is 20414411. The next prime is 20414437. The reversal of 20414421 is 12441402.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 6687396 = 3705^2 + 2586^2 .

It is not a de Polignac number, because 20414421 - 2⁵ = 20414389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20414394 and 20414403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20414411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134126 + ... + 1134143.

It is an arithmetic number, because the mean of its divisors is an integer number (4914585).

Almost surely, 2^20414421 is an apocalyptic number.

It is an amenable number.

20414421 is a deficient number, since it is larger than the sum of its proper divisors (9073089).

20414421 is a wasteful number, since it uses less digits than its factorization.

20414421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268275 (or 2268272 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20414421 is about 4518.2320657532. The cubic root of 20414421 is about 273.3038118358.

Adding to 20414421 its reverse (12441402), we get a palindrome (32855823).

The spelling of 20414421 in words is "twenty million, four hundred fourteen thousand, four hundred twenty-one".