20488415 has 4 divisors (see below), whose sum is σ = 24586104. Its totient is φ = 16390728.

The previous prime is 20488411. The next prime is 20488421. The reversal of 20488415 is 51488402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20488415 - 2² = 20488411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20488411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048837 + ... + 2048846.

It is an arithmetic number, because the mean of its divisors is an integer number (6146526).

Almost surely, 2^20488415 is an apocalyptic number.

20488415 is a deficient number, since it is larger than the sum of its proper divisors (4097689).

20488415 is an equidigital number, since it uses as much as digits as its factorization.

20488415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097688.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 20488415 is about 4526.4130390410. The cubic root of 20488415 is about 273.6336188569.

The spelling of 20488415 in words is "twenty million, four hundred eighty-eight thousand, four hundred fifteen".