21480654 has 16 divisors (see below), whose sum is σ = 46266192. Its totient is φ = 6609408.

The previous prime is 21480647. The next prime is 21480671. The reversal of 21480654 is 45608412.

It is a super-2 number, since 2×21480654² = 922836992535432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 137619 + ... + 137774.

It is an arithmetic number, because the mean of its divisors is an integer number (2891637).

Almost surely, 2^21480654 is an apocalyptic number.

21480654 is an abundant number, since it is smaller than the sum of its proper divisors (24785538).

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

21480654 is a wasteful number, since it uses less digits than its factorization.

21480654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275411.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 21480654 is about 4634.7226454233. The cubic root of 21480654 is about 277.9814610759.

The spelling of 21480654 in words is "twenty-one million, four hundred eighty thousand, six hundred fifty-four".