20421322312402 has 16 divisors (see below), whose sum is σ = 33416979544224. Its totient is φ = 9282344148000.

The previous prime is 20421322312381. The next prime is 20421322312421.

20421322312402 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925299 + ... + 6457462.

It is an arithmetic number, because the mean of its divisors is an integer number (2088561221514).

Almost surely, 2^{20421322312402} is an apocalyptic number.

20421322312402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20421322312402 is a deficient number, since it is larger than the sum of its proper divisors (12995657231822).

20421322312402 is a wasteful number, since it uses less digits than its factorization.

20421322312402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7508505.

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 2042132 and 2312402, that added together give a palindrome (4354534).

The spelling of 20421322312402 in words is "twenty trillion, four hundred twenty-one billion, three hundred twenty-two million, three hundred twelve thousand, four hundred two".