20473537 has 4 divisors (see below), whose sum is σ = 23398336. Its totient is φ = 17548740.

The previous prime is 20473517. The next prime is 20473549. The reversal of 20473537 is 73537402.

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: 73537402 = 2 ⋅36768701.

It is a cyclic number.

It is not a de Polignac number, because 20473537 - 2¹¹ = 20471489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20473499 and 20473508.

It is not an unprimeable number, because it can be changed into a prime (20473517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462389 + ... + 1462402.

It is an arithmetic number, because the mean of its divisors is an integer number (5849584).

Almost surely, 2^20473537 is an apocalyptic number.

It is an amenable number.

20473537 is a deficient number, since it is larger than the sum of its proper divisors (2924799).

20473537 is an equidigital number, since it uses as much as digits as its factorization.

20473537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924798.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 20473537 is about 4524.7692758858. The cubic root of 20473537 is about 273.5673682983.

The spelling of 20473537 in words is "twenty million, four hundred seventy-three thousand, five hundred thirty-seven".