20607391 has 12 divisors (see below), whose sum is σ = 24333528. Its totient is φ = 17397072.

The previous prime is 20607361. The next prime is 20607413. The reversal of 20607391 is 19370602.

It is not a de Polignac number, because 20607391 - 2⁷ = 20607263 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 (20607311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145 + ... + 6421.

It is an arithmetic number, because the mean of its divisors is an integer number (2027794).

Almost surely, 2^20607391 is an apocalyptic number.

20607391 is a deficient number, since it is larger than the sum of its proper divisors (3726137).

20607391 is an equidigital number, since it uses as much as digits as its factorization.

20607391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358 (or 6351 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20607391 is about 4539.5364300774. The cubic root of 20607391 is about 274.1622593728.

Adding to 20607391 its reverse (19370602), we get a palindrome (39977993).

The spelling of 20607391 in words is "twenty million, six hundred seven thousand, three hundred ninety-one".