20734545 has 16 divisors (see below), whose sum is σ = 35727552. Its totient is φ = 10207680.

The previous prime is 20734531. The next prime is 20734559. The reversal of 20734545 is 54543702.

It is an interprime number because it is at equal distance from previous prime (20734531) and next prime (20734559).

It is not a de Polignac number, because 20734545 - 2¹⁶ = 20669009 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52971 + ... + 53360.

It is an arithmetic number, because the mean of its divisors is an integer number (2232972).

Almost surely, 2^20734545 is an apocalyptic number.

It is an amenable number.

20734545 is a deficient number, since it is larger than the sum of its proper divisors (14993007).

20734545 is a wasteful number, since it uses less digits than its factorization.

20734545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106352.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 20734545 is about 4553.5200669372. The cubic root of 20734545 is about 274.7249922939.

The spelling of 20734545 in words is "twenty million, seven hundred thirty-four thousand, five hundred forty-five".