20488195 has 32 divisors (see below), whose sum is σ = 31102848. Its totient is φ = 12607488.

The previous prime is 20488189. The next prime is 20488199. The reversal of 20488195 is 59188402.

It is a 13-Lehmer number, since φ(20488195) divides (20488195-1)¹³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20488195 is a prime.

It is a super-2 number, since 2×20488195² = 839532268716050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (20488199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16227 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (971964).

Almost surely, 2^20488195 is an apocalyptic number.

20488195 is a deficient number, since it is larger than the sum of its proper divisors (10614653).

20488195 is a wasteful number, since it uses less digits than its factorization.

20488195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 20488195 is about 4526.3887371723. The cubic root of 20488195 is about 273.6326394479.

The spelling of 20488195 in words is "twenty million, four hundred eighty-eight thousand, one hundred ninety-five".