20011003131 has 32 divisors (see below), whose sum is σ = 31129638400. Its totient is φ = 11429576928.

The previous prime is 20011003087. The next prime is 20011003157. The reversal of 20011003131 is 13130011002.

It is not a de Polignac number, because 20011003131 - 2¹⁴ = 20010986747 is a prime.

It is a super-2 number, since 2×20011003131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011003171) 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, 3739800 + ... + 3745146.

It is an arithmetic number, because the mean of its divisors is an integer number (972801200).

Almost surely, 2^20011003131 is an apocalyptic number.

20011003131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20011003131 is a deficient number, since it is larger than the sum of its proper divisors (11118635269).

20011003131 is an equidigital number, since it uses as much as digits as its factorization.

20011003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008 (or 8994 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20011003131 its reverse (13130011002), we get a palindrome (33141014133).

The spelling of 20011003131 in words is "twenty billion, eleven million, three thousand, one hundred thirty-one".