20739111 has 8 divisors (see below), whose sum is σ = 27702384. Its totient is φ = 13800960.

The previous prime is 20739109. The next prime is 20739139. The reversal of 20739111 is 11193702.

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

It is not a de Polignac number, because 20739111 - 2¹ = 20739109 is a prime.

It is a super-2 number, since 2×20739111² = 860221450140642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20739101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4260 + ... + 7721.

It is an arithmetic number, because the mean of its divisors is an integer number (3462798).

Almost surely, 2^20739111 is an apocalyptic number.

20739111 is a deficient number, since it is larger than the sum of its proper divisors (6963273).

20739111 is a wasteful number, since it uses less digits than its factorization.

20739111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12561.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 20739111 is about 4554.0214096993. The cubic root of 20739111 is about 274.7451567465.

The spelling of 20739111 in words is "twenty million, seven hundred thirty-nine thousand, one hundred eleven".