20302021031 has 4 divisors (see below), whose sum is σ = 20366884032. Its totient is φ = 20237158032.

The previous prime is 20302021007. The next prime is 20302021043. The reversal of 20302021031 is 13012020302.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20302021031 is a prime.

It is a super-2 number, since 2×20302021031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302020997 and 20302021015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302021331) 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, 32431031 + ... + 32431656.

It is an arithmetic number, because the mean of its divisors is an integer number (5091721008).

Almost surely, 2^20302021031 is an apocalyptic number.

20302021031 is a deficient number, since it is larger than the sum of its proper divisors (64863001).

20302021031 is an equidigital number, since it uses as much as digits as its factorization.

20302021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64863000.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20302021031 its reverse (13012020302), we get a palindrome (33314041333).

The spelling of 20302021031 in words is "twenty billion, three hundred two million, twenty-one thousand, thirty-one".