20031012535 has 16 divisors (see below), whose sum is σ = 25485688800. Its totient is φ = 15061718016.

The previous prime is 20031012511. The next prime is 20031012539. The reversal of 20031012535 is 53521013002.

It is a cyclic number.

It is not a de Polignac number, because 20031012535 - 2¹⁷ = 20030881463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031012539) 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, 96630 + ... + 222259.

It is an arithmetic number, because the mean of its divisors is an integer number (1592855550).

Almost surely, 2^20031012535 is an apocalyptic number.

20031012535 is a deficient number, since it is larger than the sum of its proper divisors (5454676265).

20031012535 is a wasteful number, since it uses less digits than its factorization.

20031012535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319650.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 20031012535 its reverse (53521013002), we get a palindrome (73552025537).

The spelling of 20031012535 in words is "twenty billion, thirty-one million, twelve thousand, five hundred thirty-five".