20421323440262 has 8 divisors (see below), whose sum is σ = 30632011355376. Its totient is φ = 10210652988472.

The previous prime is 20421323440249. The next prime is 20421323440339. The reversal of 20421323440262 is 26204432312402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888413 + ... + 6452280.

It is an arithmetic number, because the mean of its divisors is an integer number (3829001419422).

Almost surely, 2^{20421323440262} is an apocalyptic number.

20421323440262 is a deficient number, since it is larger than the sum of its proper divisors (10210687915114).

20421323440262 is a wasteful number, since it uses less digits than its factorization.

20421323440262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731662.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 20421323440262 its reverse (26204432312402), we get a palindrome (46625755752664).

The spelling of 20421323440262 in words is "twenty trillion, four hundred twenty-one billion, three hundred twenty-three million, four hundred forty thousand, two hundred sixty-two".