20340321402 has 16 divisors (see below), whose sum is σ = 40695670080. Its totient is φ = 6777602592.

The previous prime is 20340321401. The next prime is 20340321437. The reversal of 20340321402 is 20412304302.

It is not an unprimeable number, because it can be changed into a prime (20340321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608502 + ... + 641057.

It is an arithmetic number, because the mean of its divisors is an integer number (2543479380).

Almost surely, 2^20340321402 is an apocalyptic number.

20340321402 is an abundant number, since it is smaller than the sum of its proper divisors (20355348678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20340321402 is a wasteful number, since it uses less digits than its factorization.

20340321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252277.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20340321402 its reverse (20412304302), we get a palindrome (40752625704).

The spelling of 20340321402 in words is "twenty billion, three hundred forty million, three hundred twenty-one thousand, four hundred two".