20624197 has 8 divisors (see below), whose sum is σ = 22587840. Its totient is φ = 18675360.

The previous prime is 20624183. The next prime is 20624209. The reversal of 20624197 is 79142602.

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

It is not a de Polignac number, because 20624197 - 2⁷ = 20624069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20624137) 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 7 ways as a sum of consecutive naturals, for example, 672 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (2823480).

Almost surely, 2^20624197 is an apocalyptic number.

It is an amenable number.

20624197 is a deficient number, since it is larger than the sum of its proper divisors (1963643).

20624197 is a wasteful number, since it uses less digits than its factorization.

20624197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20624197 is about 4541.3871228954. The cubic root of 20624197 is about 274.2367685454.

Adding to 20624197 its reverse (79142602), we get a palindrome (99766799).

The spelling of 20624197 in words is "twenty million, six hundred twenty-four thousand, one hundred ninety-seven".