20493355 has 16 divisors (see below), whose sum is σ = 25251840. Its totient is φ = 15960672.

The previous prime is 20493353. The next prime is 20493371. The reversal of 20493355 is 55339402.

It is a cyclic number.

It is not a de Polignac number, because 20493355 - 2¹ = 20493353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20493353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37192 + ... + 37738.

It is an arithmetic number, because the mean of its divisors is an integer number (1578240).

Almost surely, 2^20493355 is an apocalyptic number.

20493355 is a deficient number, since it is larger than the sum of its proper divisors (4758485).

20493355 is a wasteful number, since it uses less digits than its factorization.

20493355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 20493355 is about 4526.9586921022. The cubic root of 20493355 is about 273.6556091939.

The spelling of 20493355 in words is "twenty million, four hundred ninety-three thousand, three hundred fifty-five".