20653545 has 64 divisors (see below), whose sum is σ = 38320128. Its totient is φ = 9408000.

The previous prime is 20653543. The next prime is 20653547. The reversal of 20653545 is 54535602.

It is an interprime number because it is at equal distance from previous prime (20653543) and next prime (20653547).

It is not a de Polignac number, because 20653545 - 2¹ = 20653543 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20653541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290860 + ... + 290930.

It is an arithmetic number, because the mean of its divisors is an integer number (598752).

Almost surely, 2^20653545 is an apocalyptic number.

It is an amenable number.

20653545 is a deficient number, since it is larger than the sum of its proper divisors (17666583).

20653545 is a wasteful number, since it uses less digits than its factorization.

20653545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 20653545 is about 4544.6171455910. The cubic root of 20653545 is about 274.3667855048.

The spelling of 20653545 in words is "twenty million, six hundred fifty-three thousand, five hundred forty-five".