20137430473 has 2 divisors, whose sum is σ = 20137430474. Its totient is φ = 20137430472.

The previous prime is 20137430413. The next prime is 20137430483. The reversal of 20137430473 is 37403473102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12377230009 + 7760200464 = 111253^2 + 88092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20137430473 is a prime.

It is a super-2 number, since 2×20137430473² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20137430413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068715236 + 10068715237.

It is an arithmetic number, because the mean of its divisors is an integer number (10068715237).

Almost surely, 2^20137430473 is an apocalyptic number.

It is an amenable number.

20137430473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20137430473 is an equidigital number, since it uses as much as digits as its factorization.

20137430473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 34.

The spelling of 20137430473 in words is "twenty billion, one hundred thirty-seven million, four hundred thirty thousand, four hundred seventy-three".