20402740018213 has 8 divisors (see below), whose sum is σ = 23548282680960. Its totient is φ = 17314913734800.

The previous prime is 20402740018211. The next prime is 20402740018229. The reversal of 20402740018213 is 31281004720402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20402740018213 - 2¹ = 20402740018211 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 (20402740018211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14429094073 + ... + 14429095486.

It is an arithmetic number, because the mean of its divisors is an integer number (2943535335120).

Almost surely, 2^{20402740018213} is an apocalyptic number.

It is an amenable number.

20402740018213 is a deficient number, since it is larger than the sum of its proper divisors (3145542662747).

20402740018213 is a wasteful number, since it uses less digits than its factorization.

20402740018213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28858189667.

The product of its (nonzero) digits is 21504, while the sum is 34.

Adding to 20402740018213 its reverse (31281004720402), we get a palindrome (51683744738615).

The spelling of 20402740018213 in words is "twenty trillion, four hundred two billion, seven hundred forty million, eighteen thousand, two hundred thirteen".