20137430273 has 4 divisors (see below), whose sum is σ = 20138704320. Its totient is φ = 20136156228.

The previous prime is 20137430267. The next prime is 20137430329. The reversal of 20137430273 is 37203473102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37203473102 = 2 ⋅18601736551.

It is a cyclic number.

It is not a de Polignac number, because 20137430273 - 2²⁶ = 20070321409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20137430473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613013 + ... + 645026.

It is an arithmetic number, because the mean of its divisors is an integer number (5034676080).

Almost surely, 2^20137430273 is an apocalyptic number.

It is an amenable number.

20137430273 is a deficient number, since it is larger than the sum of its proper divisors (1274047).

20137430273 is a wasteful number, since it uses less digits than its factorization.

20137430273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274046.

The product of its (nonzero) digits is 21168, while the sum is 32.

The spelling of 20137430273 in words is "twenty billion, one hundred thirty-seven million, four hundred thirty thousand, two hundred seventy-three".