20726541 has 12 divisors (see below), whose sum is σ = 32660160. Its totient is φ = 12561480.

The previous prime is 20726539. The next prime is 20726543. The reversal of 20726541 is 14562702.

20726541 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 654 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20726539) and next prime (20726543).

It is not a de Polignac number, because 20726541 - 2¹ = 20726539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726543) 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 11 ways as a sum of consecutive naturals, for example, 104581 + ... + 104778.

It is an arithmetic number, because the mean of its divisors is an integer number (2721680).

Almost surely, 2^20726541 is an apocalyptic number.

It is an amenable number.

20726541 is a deficient number, since it is larger than the sum of its proper divisors (11933619).

20726541 is a wasteful number, since it uses less digits than its factorization.

20726541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209376 (or 209373 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20726541 is about 4552.6411016025. The cubic root of 20726541 is about 274.6896377388.

The spelling of 20726541 in words is "twenty million, seven hundred twenty-six thousand, five hundred forty-one".