20300031021 has 16 divisors (see below), whose sum is σ = 27458020800. Its totient is φ = 13338474240.

The previous prime is 20300030999. The next prime is 20300031043. The reversal of 20300031021 is 12013000302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20300030999) and next prime (20300031043).

It is not a de Polignac number, because 20300031021 - 2⁶ = 20300030957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20300030988 and 20300031006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300031421) 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, 8005 + ... + 201653.

It is an arithmetic number, because the mean of its divisors is an integer number (1716126300).

Almost surely, 2^20300031021 is an apocalyptic number.

It is an amenable number.

20300031021 is a deficient number, since it is larger than the sum of its proper divisors (7157989779).

20300031021 is a wasteful number, since it uses less digits than its factorization.

20300031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194156.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20300031021 its reverse (12013000302), we get a palindrome (32313031323).

The spelling of 20300031021 in words is "twenty billion, three hundred million, thirty-one thousand, twenty-one".