20772493 has 8 divisors (see below), whose sum is σ = 24026688. Its totient is φ = 17589984.

The previous prime is 20772481. The next prime is 20772517. The reversal of 20772493 is 39427702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20772493 - 2⁹ = 20771981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17296 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (3003336).

Almost surely, 2^20772493 is an apocalyptic number.

It is an amenable number.

20772493 is a deficient number, since it is larger than the sum of its proper divisors (3254195).

20772493 is an equidigital number, since it uses as much as digits as its factorization.

20772493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35843.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20772493 is about 4557.6850483551. The cubic root of 20772493 is about 274.8924891037.

The spelling of 20772493 in words is "twenty million, seven hundred seventy-two thousand, four hundred ninety-three".