20923001 has 8 divisors (see below), whose sum is σ = 22879584. Its totient is φ = 18975520.

The previous prime is 20922991. The next prime is 20923003. The reversal of 20923001 is 10032902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20923001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20923003) 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, 3101 + ... + 7173.

It is an arithmetic number, because the mean of its divisors is an integer number (2859948).

Almost surely, 2^20923001 is an apocalyptic number.

It is an amenable number.

20923001 is a deficient number, since it is larger than the sum of its proper divisors (1956583).

20923001 is a wasteful number, since it uses less digits than its factorization.

20923001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20923001 is about 4574.1667000668. The cubic root of 20923001 is about 275.5548072071.

Adding to 20923001 its reverse (10032902), we get a palindrome (30955903).

The spelling of 20923001 in words is "twenty million, nine hundred twenty-three thousand, one".