20339967 has 8 divisors (see below), whose sum is σ = 27143424. Its totient is φ = 13548248.

The previous prime is 20339959. The next prime is 20339983. The reversal of 20339967 is 76993302.

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 20339967 - 2³ = 20339959 is a prime.

It is a super-2 number, since 2×20339967² = 827428515122178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (3392928).

Almost surely, 2^20339967 is an apocalyptic number.

20339967 is a deficient number, since it is larger than the sum of its proper divisors (6803457).

20339967 is a wasteful number, since it uses less digits than its factorization.

20339967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 20339967 is about 4509.9852549648. The cubic root of 20339967 is about 272.9711491201.

The spelling of 20339967 in words is "twenty million, three hundred thirty-nine thousand, nine hundred sixty-seven".