20293057 has 4 divisors (see below), whose sum is σ = 20841556. Its totient is φ = 19744560.

The previous prime is 20292997. The next prime is 20293067. The reversal of 20293057 is 75039202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14984641 + 5308416 = 3871^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 20293057 - 2²³ = 11904449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20293067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274194 + ... + 274267.

It is an arithmetic number, because the mean of its divisors is an integer number (5210389).

Almost surely, 2^20293057 is an apocalyptic number.

It is an amenable number.

20293057 is a deficient number, since it is larger than the sum of its proper divisors (548499).

20293057 is an equidigital number, since it uses as much as digits as its factorization.

20293057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548498.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20293057 is about 4504.7815707313. The cubic root of 20293057 is about 272.7611367613.

The spelling of 20293057 in words is "twenty million, two hundred ninety-three thousand, fifty-seven".