20420344413124 has 12 divisors (see below), whose sum is σ = 35739430099324. Its totient is φ = 10209078670464.

The previous prime is 20420344413113. The next prime is 20420344413163. The reversal of 20420344413124 is 42131444302402.

It can be written as a sum of positive squares in 2 ways, for example, as 16810656006400 + 3609688406724 = 4100080^2 + 1899918^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20420344413124.

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, 273342009 + ... + 273416704.

Almost surely, 2^{20420344413124} is an apocalyptic number.

It is an amenable number.

20420344413124 is a deficient number, since it is larger than the sum of its proper divisors (15319085686200).

20420344413124 is a wasteful number, since it uses less digits than its factorization.

20420344413124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546768054 (or 546768052 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 20420344413124 its reverse (42131444302402), we get a palindrome (62551788715526).

The spelling of 20420344413124 in words is "twenty trillion, four hundred twenty billion, three hundred forty-four million, four hundred thirteen thousand, one hundred twenty-four".