20488933 has 2 divisors, whose sum is σ = 20488934. Its totient is φ = 20488932.

The previous prime is 20488931. The next prime is 20488943. The reversal of 20488933 is 33988402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 8538084 = 3457^2 + 2922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20488933 - 2¹ = 20488931 is a prime.

Together with 20488931, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20488892 and 20488901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20488931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244466 + 10244467.

It is an arithmetic number, because the mean of its divisors is an integer number (10244467).

Almost surely, 2^20488933 is an apocalyptic number.

It is an amenable number.

20488933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488933 is an equidigital number, since it uses as much as digits as its factorization.

20488933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20488933 is about 4526.4702583801. The cubic root of 20488933 is about 273.6359248921.

The spelling of 20488933 in words is "twenty million, four hundred eighty-eight thousand, nine hundred thirty-three".