20196487 has 8 divisors (see below), whose sum is σ = 21834800. Its totient is φ = 18615744.

The previous prime is 20196443. The next prime is 20196509. The reversal of 20196487 is 78469102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20196487 - 2⁷ = 20196359 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20196427) 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 7 ways as a sum of consecutive naturals, for example, 13662 + ... + 15067.

It is an arithmetic number, because the mean of its divisors is an integer number (2729350).

Almost surely, 2^20196487 is an apocalyptic number.

20196487 is a deficient number, since it is larger than the sum of its proper divisors (1638313).

20196487 is a wasteful number, since it uses less digits than its factorization.

20196487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28785.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20196487 is about 4494.0501777350. The cubic root of 20196487 is about 272.3277794040.

The spelling of 20196487 in words is "twenty million, one hundred ninety-six thousand, four hundred eighty-seven".