20468087 has 4 divisors (see below), whose sum is σ = 20480376. Its totient is φ = 20455800.

The previous prime is 20468081. The next prime is 20468099. The reversal of 20468087 is 78086402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78086402 = 2 ⋅39043201.

It is a cyclic number.

It is not a de Polignac number, because 20468087 - 2²⁰ = 19419511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164 + ... + 7137.

It is an arithmetic number, because the mean of its divisors is an integer number (5120094).

Almost surely, 2^20468087 is an apocalyptic number.

20468087 is a deficient number, since it is larger than the sum of its proper divisors (12289).

20468087 is a wasteful number, since it uses less digits than its factorization.

20468087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12288.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20468087 is about 4524.1669951495. The cubic root of 20468087 is about 273.5430918470.

The spelling of 20468087 in words is "twenty million, four hundred sixty-eight thousand, eighty-seven".