20030736 has 80 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 5957760.

The previous prime is 20030713. The next prime is 20030737. The reversal of 20030736 is 63703002.

It is a super-3 number, since 3×20030736³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20030737) 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, 30831 + ... + 31473.

It is an arithmetic number, because the mean of its divisors is an integer number (718704).

Almost surely, 2^20030736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20030736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28748160).

20030736 is an abundant number, since it is smaller than the sum of its proper divisors (37465584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20030736 is a wasteful number, since it uses less digits than its factorization.

20030736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20030736 is about 4475.5710250202. The cubic root of 20030736 is about 271.5807410557.

Adding to 20030736 its reverse (63703002), we get a palindrome (83733738).

The spelling of 20030736 in words is "twenty million, thirty thousand, seven hundred thirty-six".