20726693 has 8 divisors (see below), whose sum is σ = 23041536. Its totient is φ = 18514800.

The previous prime is 20726683. The next prime is 20726711. The reversal of 20726693 is 39662702.

It is a happy number.

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 20726693 - 2⁸ = 20726437 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 (20726653) 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, 25313 + ... + 26118.

It is an arithmetic number, because the mean of its divisors is an integer number (2880192).

Almost surely, 2^20726693 is an apocalyptic number.

It is an amenable number.

20726693 is a deficient number, since it is larger than the sum of its proper divisors (2314843).

20726693 is a wasteful number, since it uses less digits than its factorization.

20726693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51475.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20726693 is about 4552.6577951785. The cubic root of 20726693 is about 274.6903092244.

The spelling of 20726693 in words is "twenty million, seven hundred twenty-six thousand, six hundred ninety-three".