20505735 has 12 divisors (see below), whose sum is σ = 35543352. Its totient is φ = 10936368.

The previous prime is 20505713. The next prime is 20505761. The reversal of 20505735 is 53750502.

It is not a de Polignac number, because 20505735 - 2¹¹ = 20503687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20505699 and 20505708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227797 + ... + 227886.

It is an arithmetic number, because the mean of its divisors is an integer number (2961946).

Almost surely, 2^20505735 is an apocalyptic number.

20505735 is a deficient number, since it is larger than the sum of its proper divisors (15037617).

20505735 is a wasteful number, since it uses less digits than its factorization.

20505735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455694 (or 455691 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 20505735 is about 4528.3258495828. The cubic root of 20505735 is about 273.7107030600.

The spelling of 20505735 in words is "twenty million, five hundred five thousand, seven hundred thirty-five".