20796905 has 8 divisors (see below), whose sum is σ = 25147584. Its totient is φ = 16510000.

The previous prime is 20796901. The next prime is 20796917. The reversal of 20796905 is 50969702.

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

It is not a de Polignac number, because 20796905 - 2² = 20796901 is a prime.

It is a super-2 number, since 2×20796905² = 865022515158050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20796901) 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, 15221 + ... + 16530.

It is an arithmetic number, because the mean of its divisors is an integer number (3143448).

Almost surely, 2^20796905 is an apocalyptic number.

It is an amenable number.

20796905 is a deficient number, since it is larger than the sum of its proper divisors (4350679).

20796905 is a wasteful number, since it uses less digits than its factorization.

20796905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31887.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20796905 is about 4560.3623759522. The cubic root of 20796905 is about 275.0001322313. Note that the first 3 decimals are identical.

The spelling of 20796905 in words is "twenty million, seven hundred ninety-six thousand, nine hundred five".