20122759 has 8 divisors (see below), whose sum is σ = 20728512. Its totient is φ = 19522560.

The previous prime is 20122757. The next prime is 20122763. The reversal of 20122759 is 95722102.

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

It is not a de Polignac number, because 20122759 - 2¹ = 20122757 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 (20122757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6642 + ... + 9184.

It is an arithmetic number, because the mean of its divisors is an integer number (2591064).

Almost surely, 2^20122759 is an apocalyptic number.

20122759 is a deficient number, since it is larger than the sum of its proper divisors (605753).

20122759 is a wasteful number, since it uses less digits than its factorization.

20122759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20122759 is about 4485.8398321830. The cubic root of 20122759 is about 271.9959945705.

The spelling of 20122759 in words is "twenty million, one hundred twenty-two thousand, seven hundred fifty-nine".