20573091 has 36 divisors (see below), whose sum is σ = 37719864. Its totient is φ = 10684800.

The previous prime is 20573089. The next prime is 20573141. The reversal of 20573091 is 19037502.

20573091 is a `hidden beast` number, since 2 + 0 + 573 + 0 + 91 = 666.

It is not a de Polignac number, because 20573091 - 2¹ = 20573089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20573011) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2731 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (1047774).

Almost surely, 2^20573091 is an apocalyptic number.

20573091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20573091 is a deficient number, since it is larger than the sum of its proper divisors (17146773).

20573091 is a wasteful number, since it uses less digits than its factorization.

20573091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272 (or 4262 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20573091 is about 4535.7569379322. The cubic root of 20573091 is about 274.0100649863.

The spelling of 20573091 in words is "twenty million, five hundred seventy-three thousand, ninety-one".