20494786 has 8 divisors (see below), whose sum is σ = 33107004. Its totient is φ = 9459120.

The previous prime is 20494783. The next prime is 20494807. The reversal of 20494786 is 68749402.

It can be written as a sum of positive squares in 2 ways, for example, as 20385225 + 109561 = 4515^2 + 331^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20494783) 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, 394105 + ... + 394156.

Almost surely, 2^20494786 is an apocalyptic number.

20494786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20494786 is a deficient number, since it is larger than the sum of its proper divisors (12612218).

20494786 is a wasteful number, since it uses less digits than its factorization.

20494786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788276.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20494786 is about 4527.1167424753. The cubic root of 20494786 is about 273.6619786091.

The spelling of 20494786 in words is "twenty million, four hundred ninety-four thousand, seven hundred eighty-six".