20914907 has 4 divisors (see below), whose sum is σ = 22523760. Its totient is φ = 19306056.

The previous prime is 20914903. The next prime is 20914919. The reversal of 20914907 is 70941902.

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 20914907 - 2² = 20914903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20914903) 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, 804407 + ... + 804432.

It is an arithmetic number, because the mean of its divisors is an integer number (5630940).

Almost surely, 2^20914907 is an apocalyptic number.

20914907 is a deficient number, since it is larger than the sum of its proper divisors (1608853).

20914907 is a wasteful number, since it uses less digits than its factorization.

20914907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608852.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 20914907 is about 4573.2818631700. The cubic root of 20914907 is about 275.5192701082.

The spelling of 20914907 in words is "twenty million, nine hundred fourteen thousand, nine hundred seven".