20396445 has 16 divisors (see below), whose sum is σ = 32959872. Its totient is φ = 10769600.

The previous prime is 20396401. The next prime is 20396459. The reversal of 20396445 is 54469302.

It is not a de Polignac number, because 20396445 - 2⁶ = 20396381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5217 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (2059992).

Almost surely, 2^20396445 is an apocalyptic number.

It is an amenable number.

20396445 is a deficient number, since it is larger than the sum of its proper divisors (12563427).

20396445 is a wasteful number, since it uses less digits than its factorization.

20396445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13572.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20396445 is about 4516.2423539930. The cubic root of 20396445 is about 273.2235686904.

The spelling of 20396445 in words is "twenty million, three hundred ninety-six thousand, four hundred forty-five".