20488213 has 16 divisors (see below), whose sum is σ = 23051520. Its totient is φ = 18095616.

The previous prime is 20488201. The next prime is 20488219. The reversal of 20488213 is 31288402.

It is a de Polignac number, because none of the positive numbers 2^k-20488213 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 (20488219) 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, 44020 + ... + 44482.

It is an arithmetic number, because the mean of its divisors is an integer number (1440720).

Almost surely, 2^20488213 is an apocalyptic number.

It is an amenable number.

20488213 is a deficient number, since it is larger than the sum of its proper divisors (2563307).

20488213 is a wasteful number, since it uses less digits than its factorization.

20488213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20488213 is about 4526.3907255119. The cubic root of 20488213 is about 273.6327195816.

The spelling of 20488213 in words is "twenty million, four hundred eighty-eight thousand, two hundred thirteen".