20030131 has 32 divisors (see below), whose sum is σ = 24634368. Its totient is φ = 16074240.

The previous prime is 20030117. The next prime is 20030137. The reversal of 20030131 is 13103002.

It is a cyclic number.

It is not a de Polignac number, because 20030131 - 2¹¹ = 20028083 is a prime.

It is a super-2 number, since 2×20030131² = 802412295754322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20030137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377901 + ... + 377953.

It is an arithmetic number, because the mean of its divisors is an integer number (769824).

Almost surely, 2^20030131 is an apocalyptic number.

20030131 is a deficient number, since it is larger than the sum of its proper divisors (4604237).

20030131 is a wasteful number, since it uses less digits than its factorization.

20030131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20030131 is about 4475.5034353690. The cubic root of 20030131 is about 271.5780067910.

Adding to 20030131 its reverse (13103002), we get a palindrome (33133133).

The spelling of 20030131 in words is "twenty million, thirty thousand, one hundred thirty-one".