20620371 has 8 divisors (see below), whose sum is σ = 29111184. Its totient is φ = 12938240.

The previous prime is 20620361. The next prime is 20620373. The reversal of 20620371 is 17302602.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20620371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20620373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202110 + ... + 202211.

It is an arithmetic number, because the mean of its divisors is an integer number (3638898).

Almost surely, 2^20620371 is an apocalyptic number.

20620371 is a deficient number, since it is larger than the sum of its proper divisors (8490813).

20620371 is a wasteful number, since it uses less digits than its factorization.

20620371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404341.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20620371 is about 4540.9658664209. The cubic root of 20620371 is about 274.2198095859.

Adding to 20620371 its reverse (17302602), we get a palindrome (37922973).

The spelling of 20620371 in words is "twenty million, six hundred twenty thousand, three hundred seventy-one".