20349967 has 8 divisors (see below), whose sum is σ = 22965840. Its totient is φ = 17861760.

The previous prime is 20349961. The next prime is 20349971. The reversal of 20349967 is 76994302.

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 20349967 - 2⁷ = 20349839 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 (20349961) 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, 31578 + ... + 32215.

It is an arithmetic number, because the mean of its divisors is an integer number (2870730).

Almost surely, 2^20349967 is an apocalyptic number.

20349967 is a deficient number, since it is larger than the sum of its proper divisors (2615873).

20349967 is a wasteful number, since it uses less digits than its factorization.

20349967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63833.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20349967 is about 4511.0937698079. The cubic root of 20349967 is about 273.0158765651.

It can be divided in two parts, 20349 and 967, that added together give a square (21316 = 146²).

The spelling of 20349967 in words is "twenty million, three hundred forty-nine thousand, nine hundred sixty-seven".