20748485 has 8 divisors (see below), whose sum is σ = 25756920. Its totient is φ = 16026304.

The previous prime is 20748473. The next prime is 20748491. The reversal of 20748485 is 58484702.

It can be written as a sum of positive squares in 4 ways, for example, as 82369 + 20666116 = 287^2 + 4546^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20748485 - 2⁶ = 20748421 is a prime.

It is a super-3 number, since 3×20748485³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71402 + ... + 71691.

It is an arithmetic number, because the mean of its divisors is an integer number (3219615).

Almost surely, 2^20748485 is an apocalyptic number.

It is an amenable number.

20748485 is a deficient number, since it is larger than the sum of its proper divisors (5008435).

20748485 is a wasteful number, since it uses less digits than its factorization.

20748485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143127.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 20748485 is about 4555.0504936828. The cubic root of 20748485 is about 274.7865451031.

The spelling of 20748485 in words is "twenty million, seven hundred forty-eight thousand, four hundred eighty-five".