20485707 has 16 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 12382400.

The previous prime is 20485693. The next prime is 20485711. The reversal of 20485707 is 70758402.

It is a cyclic number.

It is not a de Polignac number, because 20485707 - 2¹⁰ = 20484683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20485757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18232 + ... + 19322.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^20485707 is an apocalyptic number.

20485707 is a deficient number, since it is larger than the sum of its proper divisors (9391413).

20485707 is a wasteful number, since it uses less digits than its factorization.

20485707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 20485707 is about 4526.1138960481. The cubic root of 20485707 is about 273.6215627349.

The spelling of 20485707 in words is "twenty million, four hundred eighty-five thousand, seven hundred seven".