21460554 has 12 divisors (see below), whose sum is σ = 46497906. Its totient is φ = 7153512.

The previous prime is 21460553. The next prime is 21460559. The reversal of 21460554 is 45506412.

21460554 is a `hidden beast` number, since 2 + 1 + 4 + 605 + 54 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 2772225 = 4323^2 + 1665^2 .

It is not an unprimeable number, because it can be changed into a prime (21460553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 596109 + ... + 596144.

Almost surely, 2^21460554 is an apocalyptic number.

21460554 is an abundant number, since it is smaller than the sum of its proper divisors (25037352).

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

21460554 is a wasteful number, since it uses less digits than its factorization.

21460554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192261 (or 1192258 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 21460554 is about 4632.5537233798. The cubic root of 21460554 is about 277.8947292188.

Adding to 21460554 its reverse (45506412), we get a palindrome (66966966).

The spelling of 21460554 in words is "twenty-one million, four hundred sixty thousand, five hundred fifty-four".