20499093 has 12 divisors (see below), whose sum is σ = 31351788. Its totient is φ = 12862080.

The previous prime is 20499077. The next prime is 20499113. The reversal of 20499093 is 39099402.

It can be written as a sum of positive squares in 2 ways, for example, as 19158129 + 1340964 = 4377^2 + 1158^2 .

It is not a de Polignac number, because 20499093 - 2⁴ = 20499077 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20499023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66838 + ... + 67143.

It is an arithmetic number, because the mean of its divisors is an integer number (2612649).

Almost surely, 2^20499093 is an apocalyptic number.

It is an amenable number.

20499093 is a deficient number, since it is larger than the sum of its proper divisors (10852695).

20499093 is a wasteful number, since it uses less digits than its factorization.

20499093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134004 (or 134001 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 20499093 is about 4527.5924065667. The cubic root of 20499093 is about 273.6811473802.

The spelling of 20499093 in words is "twenty million, four hundred ninety-nine thousand, ninety-three".