20839007 has 4 divisors (see below), whose sum is σ = 23816016. Its totient is φ = 17862000.

The previous prime is 20838971. The next prime is 20839009. The reversal of 20839007 is 70093802.

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 20839007 - 2⁸ = 20838751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839009) 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, 1488494 + ... + 1488507.

It is an arithmetic number, because the mean of its divisors is an integer number (5954004).

Almost surely, 2^20839007 is an apocalyptic number.

20839007 is a deficient number, since it is larger than the sum of its proper divisors (2977009).

20839007 is an equidigital number, since it uses as much as digits as its factorization.

20839007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977008.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20839007 is about 4564.9761226101. The cubic root of 20839007 is about 275.1855805201.

The spelling of 20839007 in words is "twenty million, eight hundred thirty-nine thousand, seven".