21860676 has 36 divisors (see below), whose sum is σ = 55481244. Its totient is φ = 7257600.

The previous prime is 21860651. The next prime is 21860689. The reversal of 21860676 is 67606812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14243076 + 7617600 = 3774^2 + 2760^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21860676.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9036 + ... + 11196.

Almost surely, 2^21860676 is an apocalyptic number.

It is an amenable number.

21860676 is an abundant number, since it is smaller than the sum of its proper divisors (33620568).

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

21860676 is a wasteful number, since it uses less digits than its factorization.

21860676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 21860676 is about 4675.5401826955. The cubic root of 21860676 is about 279.6111779993.

The spelling of 21860676 in words is "twenty-one million, eight hundred sixty thousand, six hundred seventy-six".