20020431223013 has 24 divisors (see below), whose sum is σ = 22184590383648. Its totient is φ = 18049400171712.

The previous prime is 20020431222893. The next prime is 20020431223129. The reversal of 20020431223013 is 31032213402002.

It is not a de Polignac number, because 20020431223013 - 2¹⁶ = 20020431157477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20020431223013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020431228013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117545831 + ... + 117716027.

It is an arithmetic number, because the mean of its divisors is an integer number (924357932652).

Almost surely, 2^{20020431223013} is an apocalyptic number.

It is an amenable number.

20020431223013 is a deficient number, since it is larger than the sum of its proper divisors (2164159160635).

20020431223013 is a wasteful number, since it uses less digits than its factorization.

20020431223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186453 (or 186440 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20020431223013 its reverse (31032213402002), we get a palindrome (51052644625015).

The spelling of 20020431223013 in words is "twenty trillion, twenty billion, four hundred thirty-one million, two hundred twenty-three thousand, thirteen".