21488862 has 16 divisors (see below), whose sum is σ = 43706880. Its totient is φ = 7041432.

The previous prime is 21488839. The next prime is 21488881. The reversal of 21488862 is 26888412.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 21488862.

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, 29998 + ... + 30705.

It is an arithmetic number, because the mean of its divisors is an integer number (2731680).

Almost surely, 2^21488862 is an apocalyptic number.

21488862 is an abundant number, since it is smaller than the sum of its proper divisors (22218018).

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

21488862 is a wasteful number, since it uses less digits than its factorization.

21488862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60767.

The product of its digits is 49152, while the sum is 39.

The square root of 21488862 is about 4635.6080507308. The cubic root of 21488862 is about 278.0168631836.

The spelling of 21488862 in words is "twenty-one million, four hundred eighty-eight thousand, eight hundred sixty-two".