20055445 has 16 divisors (see below), whose sum is σ = 24666048. Its totient is φ = 15649920.

The previous prime is 20055433. The next prime is 20055463. The reversal of 20055445 is 54455002.

It is not a de Polignac number, because 20055445 - 2⁹ = 20054933 is a prime.

It is a Duffinian number.

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, 43657 + ... + 44113.

It is an arithmetic number, because the mean of its divisors is an integer number (1541628).

Almost surely, 2^20055445 is an apocalyptic number.

It is an amenable number.

20055445 is a deficient number, since it is larger than the sum of its proper divisors (4610603).

20055445 is a wasteful number, since it uses less digits than its factorization.

20055445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20055445 is about 4478.3306041426. The cubic root of 20055445 is about 271.6923650315.

The spelling of 20055445 in words is "twenty million, fifty-five thousand, four hundred forty-five".