20071739 has 8 divisors (see below), whose sum is σ = 20346480. Its totient is φ = 19799136.

The previous prime is 20071729. The next prime is 20071757. The reversal of 20071739 is 93717002.

It is a happy number.

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 20071739 - 2⁸ = 20071483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071729) 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, 27017 + ... + 27749.

It is an arithmetic number, because the mean of its divisors is an integer number (2543310).

Almost surely, 2^20071739 is an apocalyptic number.

20071739 is a deficient number, since it is larger than the sum of its proper divisors (274741).

20071739 is a wasteful number, since it uses less digits than its factorization.

20071739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 20071739 is about 4480.1494394719. The cubic root of 20071739 is about 271.7659237258.

The spelling of 20071739 in words is "twenty million, seventy-one thousand, seven hundred thirty-nine".