20945535 has 32 divisors (see below), whose sum is σ = 36324288. Its totient is φ = 10245120.

The previous prime is 20945521. The next prime is 20945537. The reversal of 20945535 is 53554902.

It is not a de Polignac number, because 20945535 - 2⁶ = 20945471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20945496 and 20945505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45205 + ... + 45665.

It is an arithmetic number, because the mean of its divisors is an integer number (1135134).

Almost surely, 2^20945535 is an apocalyptic number.

20945535 is a deficient number, since it is larger than the sum of its proper divisors (15378753).

20945535 is a wasteful number, since it uses less digits than its factorization.

20945535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 20945535 is about 4576.6292181036. The cubic root of 20945535 is about 275.6536955742.

The spelling of 20945535 in words is "twenty million, nine hundred forty-five thousand, five hundred thirty-five".