20210223013 has 4 divisors (see below), whose sum is σ = 20211789580. Its totient is φ = 20208656448.

The previous prime is 20210223001. The next prime is 20210223037. The reversal of 20210223013 is 31032201202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7002007684 + 13208215329 = 83678^2 + 114927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210223013 is a prime.

It is a super-2 number, since 2×20210223013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210223043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763770 + ... + 789787.

It is an arithmetic number, because the mean of its divisors is an integer number (5052947395).

Almost surely, 2^20210223013 is an apocalyptic number.

It is an amenable number.

20210223013 is a deficient number, since it is larger than the sum of its proper divisors (1566567).

20210223013 is a wasteful number, since it uses less digits than its factorization.

20210223013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566566.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20210223013 its reverse (31032201202), we get a palindrome (51242424215).

The spelling of 20210223013 in words is "twenty billion, two hundred ten million, two hundred twenty-three thousand, thirteen".