20463121 has 16 divisors (see below), whose sum is σ = 25176960. Its totient is φ = 16231680.

The previous prime is 20463119. The next prime is 20463137. The reversal of 20463121 is 12136402.

It is a cyclic number.

It is not a de Polignac number, because 20463121 - 2¹ = 20463119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20463181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5850 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (1573560).

Almost surely, 2^20463121 is an apocalyptic number.

It is an amenable number.

20463121 is a deficient number, since it is larger than the sum of its proper divisors (4713839).

20463121 is a wasteful number, since it uses less digits than its factorization.

20463121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20463121 is about 4523.6181315403. The cubic root of 20463121 is about 273.5209675701.

Adding to 20463121 its reverse (12136402), we get a palindrome (32599523).

The spelling of 20463121 in words is "twenty million, four hundred sixty-three thousand, one hundred twenty-one".