20996501 has 8 divisors (see below), whose sum is σ = 22699680. Its totient is φ = 19353168.

The previous prime is 20996497. The next prime is 20996531. The reversal of 20996501 is 10569902.

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

It is a cyclic number.

It is not a de Polignac number, because 20996501 - 2² = 20996497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20996531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14231 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (2837460).

Almost surely, 2^20996501 is an apocalyptic number.

It is an amenable number.

20996501 is a deficient number, since it is larger than the sum of its proper divisors (1703179).

20996501 is a wasteful number, since it uses less digits than its factorization.

20996501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29923.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20996501 is about 4582.1939068529. The cubic root of 20996501 is about 275.8770938097.

The spelling of 20996501 in words is "twenty million, nine hundred ninety-six thousand, five hundred one".