20203012131 has 4 divisors (see below), whose sum is σ = 26937349512. Its totient is φ = 13468674752.

The previous prime is 20203012127. The next prime is 20203012153. The reversal of 20203012131 is 13121030202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20203012131 - 2² = 20203012127 is a prime.

It is a super-2 number, since 2×20203012131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20203012131.

It is not an unprimeable number, because it can be changed into a prime (20203012631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367168686 + ... + 3367168691.

It is an arithmetic number, because the mean of its divisors is an integer number (6734337378).

Almost surely, 2^20203012131 is an apocalyptic number.

20203012131 is a deficient number, since it is larger than the sum of its proper divisors (6734337381).

20203012131 is an equidigital number, since it uses as much as digits as its factorization.

20203012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734337380.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20203012131 its reverse (13121030202), we get a palindrome (33324042333).

The spelling of 20203012131 in words is "twenty billion, two hundred three million, twelve thousand, one hundred thirty-one".