20923007 has 8 divisors (see below), whose sum is σ = 24736800. Its totient is φ = 17315424.

The previous prime is 20923003. The next prime is 20923033. The reversal of 20923007 is 70032902.

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

It is not a de Polignac number, because 20923007 - 2² = 20923003 is a prime.

It is a Duffinian number.

It is a congruent 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, 51332 + ... + 51737.

It is an arithmetic number, because the mean of its divisors is an integer number (3092100).

Almost surely, 2^20923007 is an apocalyptic number.

20923007 is a deficient number, since it is larger than the sum of its proper divisors (3813793).

20923007 is a wasteful number, since it uses less digits than its factorization.

20923007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103105.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20923007 is about 4574.1673559239. The cubic root of 20923007 is about 275.5548335470.

Adding to 20923007 its reverse (70032902), we get a palindrome (90955909).

The spelling of 20923007 in words is "twenty million, nine hundred twenty-three thousand, seven".