20477685 has 16 divisors (see below), whose sum is σ = 32820480. Its totient is φ = 10902720.

The previous prime is 20477647. The next prime is 20477693. The reversal of 20477685 is 58677402.

It is not a de Polignac number, because 20477685 - 2¹² = 20473589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16020 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (2051280).

Almost surely, 2^20477685 is an apocalyptic number.

It is an amenable number.

20477685 is a deficient number, since it is larger than the sum of its proper divisors (12342795).

20477685 is a wasteful number, since it uses less digits than its factorization.

20477685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 20477685 is about 4525.2276185845. The cubic root of 20477685 is about 273.5858422405.

The spelling of 20477685 in words is "twenty million, four hundred seventy-seven thousand, six hundred eighty-five".