20120739 has 8 divisors (see below), whose sum is σ = 26901072. Its totient is φ = 13377120.

The previous prime is 20120729. The next prime is 20120743. The reversal of 20120739 is 93702102.

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

It is a de Polignac number, because none of the positive numbers 2^k-20120739 is a prime.

It is a super-2 number, since 2×20120739² = 809688275812242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20120719) 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, 7872 + ... + 10109.

It is an arithmetic number, because the mean of its divisors is an integer number (3362634).

Almost surely, 2^20120739 is an apocalyptic number.

20120739 is a deficient number, since it is larger than the sum of its proper divisors (6780333).

20120739 is a wasteful number, since it uses less digits than its factorization.

20120739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18357.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20120739 is about 4485.6146735983. The cubic root of 20120739 is about 271.9868929310.

The spelling of 20120739 in words is "twenty million, one hundred twenty thousand, seven hundred thirty-nine".