20468537 has 4 divisors (see below), whose sum is σ = 20481060. Its totient is φ = 20456016.

The previous prime is 20468533. The next prime is 20468549. The reversal of 20468537 is 73586402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 12538681 = 2816^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 20468537 - 2² = 20468533 is a prime.

It is a super-2 number, since 2×20468537² = 837922013840738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20468497 and 20468506.

It is not an unprimeable number, because it can be changed into a prime (20468531) 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, 3362 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (5120265).

Almost surely, 2^20468537 is an apocalyptic number.

It is an amenable number.

20468537 is a deficient number, since it is larger than the sum of its proper divisors (12523).

20468537 is a wasteful number, since it uses less digits than its factorization.

20468537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12522.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20468537 is about 4524.2167277884. The cubic root of 20468537 is about 273.5450964878.

The spelling of 20468537 in words is "twenty million, four hundred sixty-eight thousand, five hundred thirty-seven".