20897366 has 16 divisors (see below), whose sum is σ = 36010656. Its totient is φ = 8909376.

The previous prime is 20897353. The next prime is 20897377. The reversal of 20897366 is 66379802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031 + ... + 6546.

It is an arithmetic number, because the mean of its divisors is an integer number (2250666).

Almost surely, 2^20897366 is an apocalyptic number.

20897366 is a deficient number, since it is larger than the sum of its proper divisors (15113290).

20897366 is a wasteful number, since it uses less digits than its factorization.

20897366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20897366 is about 4571.3636915039. The cubic root of 20897366 is about 275.4422240211.

The spelling of 20897366 in words is "twenty million, eight hundred ninety-seven thousand, three hundred sixty-six".