20726734 has 16 divisors (see below), whose sum is σ = 36492768. Its totient is φ = 8642592.

The previous prime is 20726711. The next prime is 20726737. The reversal of 20726734 is 43762702.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20726696 and 20726705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726737) 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, 19489 + ... + 20524.

It is an arithmetic number, because the mean of its divisors is an integer number (2280798).

Almost surely, 2^20726734 is an apocalyptic number.

20726734 is a deficient number, since it is larger than the sum of its proper divisors (15766034).

20726734 is a wasteful number, since it uses less digits than its factorization.

20726734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40059.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20726734 is about 4552.6622980406. The cubic root of 20726734 is about 274.6904903483.

The spelling of 20726734 in words is "twenty million, seven hundred twenty-six thousand, seven hundred thirty-four".