20691622 has 24 divisors (see below), whose sum is σ = 36320400. Its totient is φ = 8814960.

The previous prime is 20691613. The next prime is 20691647. The reversal of 20691622 is 22619602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18972 + ... + 20032.

It is an arithmetic number, because the mean of its divisors is an integer number (1513350).

Almost surely, 2^20691622 is an apocalyptic number.

20691622 is a deficient number, since it is larger than the sum of its proper divisors (15628778).

20691622 is a wasteful number, since it uses less digits than its factorization.

20691622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20691622 is about 4548.8044583165. The cubic root of 20691622 is about 274.5352900814.

The spelling of 20691622 in words is "twenty million, six hundred ninety-one thousand, six hundred twenty-two".