20468893 has 2 divisors, whose sum is σ = 20468894. Its totient is φ = 20468892.

The previous prime is 20468869. The next prime is 20468911. The reversal of 20468893 is 39886402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 2474329 = 4242^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 20468893 - 2²¹ = 18371741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20468863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234446 + 10234447.

It is an arithmetic number, because the mean of its divisors is an integer number (10234447).

Almost surely, 2^20468893 is an apocalyptic number.

It is an amenable number.

20468893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20468893 is an equidigital number, since it uses as much as digits as its factorization.

20468893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 20468893 is about 4524.2560714442. The cubic root of 20468893 is about 273.5466823606.

The spelling of 20468893 in words is "twenty million, four hundred sixty-eight thousand, eight hundred ninety-three".