20293745 has 4 divisors (see below), whose sum is σ = 24352500. Its totient is φ = 16234992.

The previous prime is 20293739. The next prime is 20293771. The reversal of 20293745 is 54739202.

It is a happy number.

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 5494336 + 14799409 = 2344^2 + 3847^2 .

It is a cyclic number.

It is not a de Polignac number, because 20293745 - 2²⁰ = 19245169 is a prime.

It is a super-2 number, since 2×20293745² = 823672172250050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029370 + ... + 2029379.

It is an arithmetic number, because the mean of its divisors is an integer number (6088125).

Almost surely, 2^20293745 is an apocalyptic number.

It is an amenable number.

20293745 is a deficient number, since it is larger than the sum of its proper divisors (4058755).

20293745 is an equidigital number, since it uses as much as digits as its factorization.

20293745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058754.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20293745 is about 4504.8579333870. The cubic root of 20293745 is about 272.7642192202.

The spelling of 20293745 in words is "twenty million, two hundred ninety-three thousand, seven hundred forty-five".