20381735 has 16 divisors (see below), whose sum is σ = 27084672. Its totient is φ = 14599200.

The previous prime is 20381731. The next prime is 20381741. The reversal of 20381735 is 53718302.

It is not a de Polignac number, because 20381735 - 2² = 20381731 is a prime.

It is a super-2 number, since 2×20381735² = 830830243220450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20381698 and 20381707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381731) 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, 920 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (1692792).

Almost surely, 2^20381735 is an apocalyptic number.

20381735 is a deficient number, since it is larger than the sum of its proper divisors (6702937).

20381735 is a wasteful number, since it uses less digits than its factorization.

20381735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20381735 is about 4514.6134939771. The cubic root of 20381735 is about 273.1578695733.

It can be divided in two parts, 2038 and 1735, that added together give a palindrome (3773).

The spelling of 20381735 in words is "twenty million, three hundred eighty-one thousand, seven hundred thirty-five".