21754485 has 12 divisors (see below), whose sum is σ = 37707852. Its totient is φ = 11602368.

The previous prime is 21754463. The next prime is 21754489. The reversal of 21754485 is 58445712.

21754485 is a `hidden beast` number, since 2 + 175 + 4 + 485 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4639716 + 17114769 = 2154^2 + 4137^2 .

It is not a de Polignac number, because 21754485 - 2⁷ = 21754357 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21754489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241672 + ... + 241761.

It is an arithmetic number, because the mean of its divisors is an integer number (3142321).

Almost surely, 2^21754485 is an apocalyptic number.

It is an amenable number.

21754485 is a deficient number, since it is larger than the sum of its proper divisors (15953367).

21754485 is a wasteful number, since it uses less digits than its factorization.

21754485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483444 (or 483441 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 21754485 is about 4664.1703442306. The cubic root of 21754485 is about 279.1576940261.

The spelling of 21754485 in words is "twenty-one million, seven hundred fifty-four thousand, four hundred eighty-five".