20923235 has 4 divisors (see below), whose sum is σ = 25107888. Its totient is φ = 16738584.

The previous prime is 20923207. The next prime is 20923247. The reversal of 20923235 is 53232902.

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

It is a cyclic number.

It is not a de Polignac number, because 20923235 - 2¹² = 20919139 is a prime.

It is a Duffinian number.

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, 2092319 + ... + 2092328.

It is an arithmetic number, because the mean of its divisors is an integer number (6276972).

Almost surely, 2^20923235 is an apocalyptic number.

20923235 is a deficient number, since it is larger than the sum of its proper divisors (4184653).

20923235 is an equidigital number, since it uses as much as digits as its factorization.

20923235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184652.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20923235 is about 4574.1922784247. The cubic root of 20923235 is about 275.5558344591. Note that the first 3 decimals are identical.

The spelling of 20923235 in words is "twenty million, nine hundred twenty-three thousand, two hundred thirty-five".