20748554 has 8 divisors (see below), whose sum is σ = 31144260. Its totient is φ = 10367136.

The previous prime is 20748547. The next prime is 20748557. The reversal of 20748554 is 45584702.

It can be written as a sum of positive squares in 2 ways, for example, as 20748025 + 529 = 4555^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20748557) 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 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 6614.

Almost surely, 2^20748554 is an apocalyptic number.

20748554 is a deficient number, since it is larger than the sum of its proper divisors (10395706).

20748554 is a wasteful number, since it uses less digits than its factorization.

20748554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 20748554 is about 4555.0580676870. The cubic root of 20748554 is about 274.7868497076.

The spelling of 20748554 in words is "twenty million, seven hundred forty-eight thousand, five hundred fifty-four".