20627091 has 12 divisors (see below), whose sum is σ = 30822480. Its totient is φ = 13277040.

The previous prime is 20627081. The next prime is 20627107. The reversal of 20627091 is 19072602.

It is not a de Polignac number, because 20627091 - 2¹⁸ = 20364947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20627011) 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, 39255 + ... + 39776.

It is an arithmetic number, because the mean of its divisors is an integer number (2568540).

Almost surely, 2^20627091 is an apocalyptic number.

20627091 is a deficient number, since it is larger than the sum of its proper divisors (10195389).

20627091 is a wasteful number, since it uses less digits than its factorization.

20627091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79066 (or 79063 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20627091 is about 4541.7057368350. The cubic root of 20627091 is about 274.2495949695.

Adding to 20627091 its reverse (19072602), we get a palindrome (39699693).

The spelling of 20627091 in words is "twenty million, six hundred twenty-seven thousand, ninety-one".