20750039 has 4 divisors (see below), whose sum is σ = 20780760. Its totient is φ = 20719320.

The previous prime is 20750027. The next prime is 20750069. The reversal of 20750039 is 93005702.

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 20750039 - 2²⁰ = 19701463 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 (20750069) 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, 14324 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (5195190).

Almost surely, 2^20750039 is an apocalyptic number.

20750039 is a deficient number, since it is larger than the sum of its proper divisors (30721).

20750039 is an equidigital number, since it uses as much as digits as its factorization.

20750039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30720.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 20750039 is about 4555.2210703763. The cubic root of 20750039 is about 274.7934051643.

The spelling of 20750039 in words is "twenty million, seven hundred fifty thousand, thirty-nine".