20726716 has 6 divisors (see below), whose sum is σ = 36271760. Its totient is φ = 10363356.

The previous prime is 20726711. The next prime is 20726737. The reversal of 20726716 is 61762702.

It is a super-2 number, since 2×20726716² = 859193512289312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726711) 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 as a sum of consecutive naturals, namely, 2590836 + ... + 2590843.

Almost surely, 2^20726716 is an apocalyptic number.

It is an amenable number.

20726716 is a deficient number, since it is larger than the sum of its proper divisors (15545044).

20726716 is a wasteful number, since it uses less digits than its factorization.

20726716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181683 (or 5181681 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20726716 is about 4552.6603211749. The cubic root of 20726716 is about 274.6904108305.

The spelling of 20726716 in words is "twenty million, seven hundred twenty-six thousand, seven hundred sixteen".