20065545 has 24 divisors (see below), whose sum is σ = 36294336. Its totient is φ = 10235808.

The previous prime is 20065541. The next prime is 20065547. The reversal of 20065545 is 54556002.

20065545 is a `hidden beast` number, since 2 + 0 + 0 + 655 + 4 + 5 = 666.

It is not a de Polignac number, because 20065545 - 2² = 20065541 is a prime.

It is a super-2 number, since 2×20065545² = 805252192294050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20065541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8659 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (1512264).

Almost surely, 2^20065545 is an apocalyptic number.

It is an amenable number.

20065545 is a deficient number, since it is larger than the sum of its proper divisors (16228791).

20065545 is a wasteful number, since it uses less digits than its factorization.

20065545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19421 (or 19418 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 20065545 is about 4479.4581145491. The cubic root of 20065545 is about 271.7379658209.

The spelling of 20065545 in words is "twenty million, sixty-five thousand, five hundred forty-five".