20090746 has 8 divisors (see below), whose sum is σ = 32454324. Its totient is φ = 9272640.

The previous prime is 20090743. The next prime is 20090747. The reversal of 20090746 is 64709002.

It can be written as a sum of positive squares in 2 ways, for example, as 18020025 + 2070721 = 4245^2 + 1439^2 .

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 (20090743) 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, 386335 + ... + 386386.

Almost surely, 2^20090746 is an apocalyptic number.

20090746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20090746 is a deficient number, since it is larger than the sum of its proper divisors (12363578).

20090746 is a wasteful number, since it uses less digits than its factorization.

20090746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772736.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20090746 is about 4482.2701837350. The cubic root of 20090746 is about 271.8516798776.

Adding to 20090746 its reverse (64709002), we get a palindrome (84799748).

The spelling of 20090746 in words is "twenty million, ninety thousand, seven hundred forty-six".