20567385 has 32 divisors (see below), whose sum is σ = 37082880. Its totient is φ = 10813824.

The previous prime is 20567377. The next prime is 20567401. The reversal of 20567385 is 58376502.

It is not a de Polignac number, because 20567385 - 2³ = 20567377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8812 + ... + 10898.

It is an arithmetic number, because the mean of its divisors is an integer number (1158840).

Almost surely, 2^20567385 is an apocalyptic number.

It is an amenable number.

20567385 is a deficient number, since it is larger than the sum of its proper divisors (16515495).

20567385 is a wasteful number, since it uses less digits than its factorization.

20567385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20567385 is about 4535.1278923532. The cubic root of 20567385 is about 273.9847301772.

The spelling of 20567385 in words is "twenty million, five hundred sixty-seven thousand, three hundred eighty-five".