20421334130 has 16 divisors (see below), whose sum is σ = 37101939840. Its totient is φ = 8092191792.

The previous prime is 20421334117. The next prime is 20421334151. The reversal of 20421334130 is 3143312402.

It is a junction number, because it is equal to n+sod(n) for n = 20421334096 and 20421334105.

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, 9541610 + ... + 9543749.

It is an arithmetic number, because the mean of its divisors is an integer number (2318871240).

Almost surely, 2^20421334130 is an apocalyptic number.

20421334130 is a deficient number, since it is larger than the sum of its proper divisors (16680605710).

20421334130 is a wasteful number, since it uses less digits than its factorization.

20421334130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19085473.

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

Adding to 20421334130 its reverse (3143312402), we get a palindrome (23564646532).

The spelling of 20421334130 in words is "twenty billion, four hundred twenty-one million, three hundred thirty-four thousand, one hundred thirty".