20726544 has 20 divisors (see below), whose sum is σ = 53543696. Its totient is φ = 6908832.

The previous prime is 20726543. The next prime is 20726557. The reversal of 20726544 is 44562702.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20726543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215854 + ... + 215949.

Almost surely, 2^20726544 is an apocalyptic number.

20726544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20726544 is an abundant number, since it is smaller than the sum of its proper divisors (32817152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20726544 is a wasteful number, since it uses less digits than its factorization.

20726544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431814 (or 431808 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20726544 is about 4552.6414310815. The cubic root of 20726544 is about 274.6896509918.

The spelling of 20726544 in words is "twenty million, seven hundred twenty-six thousand, five hundred forty-four".