20013735 has 16 divisors (see below), whose sum is σ = 36596736. Its totient is φ = 9149088.

The previous prime is 20013733. The next prime is 20013737. The reversal of 20013735 is 53731002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20013733) and next prime (20013737).

It is not a de Polignac number, because 20013735 - 2¹ = 20013733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013731) 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, 95199 + ... + 95408.

It is an arithmetic number, because the mean of its divisors is an integer number (2287296).

Almost surely, 2^20013735 is an apocalyptic number.

20013735 is a deficient number, since it is larger than the sum of its proper divisors (16583001).

20013735 is a wasteful number, since it uses less digits than its factorization.

20013735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190622.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 20013735 is about 4473.6713111269. The cubic root of 20013735 is about 271.5038849839.

Adding to 20013735 its reverse (53731002), we get a palindrome (73744737).

The spelling of 20013735 in words is "twenty million, thirteen thousand, seven hundred thirty-five".