20607545 has 32 divisors (see below), whose sum is σ = 29721600. Its totient is φ = 13418496.

The previous prime is 20607539. The next prime is 20607547. The reversal of 20607545 is 54570602.

It is not a de Polignac number, because 20607545 - 2¹⁶ = 20542009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20607547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80057 + ... + 80313.

It is an arithmetic number, because the mean of its divisors is an integer number (928800).

Almost surely, 2^20607545 is an apocalyptic number.

It is an amenable number.

20607545 is a deficient number, since it is larger than the sum of its proper divisors (9114055).

20607545 is a wasteful number, since it uses less digits than its factorization.

20607545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20607545 is about 4539.5533921301. The cubic root of 20607545 is about 274.1629423136.

The spelling of 20607545 in words is "twenty million, six hundred seven thousand, five hundred forty-five".