20785359 has 12 divisors (see below), whose sum is σ = 32238744. Its totient is φ = 11877264.

The previous prime is 20785357. The next prime is 20785367. The reversal of 20785359 is 95358702.

It is not a de Polignac number, because 20785359 - 2¹ = 20785357 is a prime.

It is a super-2 number, since 2×20785359² = 864062297517762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20785357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70552 + ... + 70845.

It is an arithmetic number, because the mean of its divisors is an integer number (2686562).

Almost surely, 2^20785359 is an apocalyptic number.

20785359 is a deficient number, since it is larger than the sum of its proper divisors (11453385).

20785359 is a wasteful number, since it uses less digits than its factorization.

20785359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141414 (or 141407 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 20785359 is about 4559.0962920298. The cubic root of 20785359 is about 274.9492313994.

The spelling of 20785359 in words is "twenty million, seven hundred eighty-five thousand, three hundred fifty-nine".