21960486 has 12 divisors (see below), whose sum is σ = 47581092. Its totient is φ = 7320156.

The previous prime is 21960473. The next prime is 21960503. The reversal of 21960486 is 68406912.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21960486.

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 5 ways as a sum of consecutive naturals, for example, 609996 + ... + 610031.

It is an arithmetic number, because the mean of its divisors is an integer number (3965091).

Almost surely, 2^21960486 is an apocalyptic number.

21960486 is an abundant number, since it is smaller than the sum of its proper divisors (25620606).

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

21960486 is a wasteful number, since it uses less digits than its factorization.

21960486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220035 (or 1220032 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 21960486 is about 4686.2016601935. The cubic root of 21960486 is about 280.0360752838.

The spelling of 21960486 in words is "twenty-one million, nine hundred sixty thousand, four hundred eighty-six".