20303023213 has 4 divisors (see below), whose sum is σ = 22148752608. Its totient is φ = 18457293820.

The previous prime is 20303023207. The next prime is 20303023229. The reversal of 20303023213 is 31232030302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20303023213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303023253) 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, 922864681 + ... + 922864702.

It is an arithmetic number, because the mean of its divisors is an integer number (5537188152).

Almost surely, 2^20303023213 is an apocalyptic number.

It is an amenable number.

20303023213 is a deficient number, since it is larger than the sum of its proper divisors (1845729395).

20303023213 is a wasteful number, since it uses less digits than its factorization.

20303023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845729394.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20303023213 its reverse (31232030302), we get a palindrome (51535053515).

The spelling of 20303023213 in words is "twenty billion, three hundred three million, twenty-three thousand, two hundred thirteen".