20923346 has 4 divisors (see below), whose sum is σ = 31385022. Its totient is φ = 10461672.

The previous prime is 20923337. The next prime is 20923349. The reversal of 20923346 is 64332902.

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

It can be written as a sum of positive squares in only one way, i.e., 13980121 + 6943225 = 3739^2 + 2635^2 .

It is not an unprimeable number, because it can be changed into a prime (20923349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5230835 + ... + 5230838.

Almost surely, 2^20923346 is an apocalyptic number.

20923346 is a deficient number, since it is larger than the sum of its proper divisors (10461676).

20923346 is a wasteful number, since it uses less digits than its factorization.

20923346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10461675.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 20923346 is about 4574.2044116983. The cubic root of 20923346 is about 275.5563217427.

The spelling of 20923346 in words is "twenty million, nine hundred twenty-three thousand, three hundred forty-six".