21114856 has 16 divisors (see below), whose sum is σ = 45246240. Its totient is φ = 9049200.

The previous prime is 21114853. The next prime is 21114869. The reversal of 21114856 is 65841112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (21114853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188470 + ... + 188581.

It is an arithmetic number, because the mean of its divisors is an integer number (2827890).

Almost surely, 2^21114856 is an apocalyptic number.

It is an amenable number.

21114856 is an abundant number, since it is smaller than the sum of its proper divisors (24131384).

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

21114856 is a wasteful number, since it uses less digits than its factorization.

21114856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377064 (or 377060 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 21114856 is about 4595.0904234846. The cubic root of 21114856 is about 276.3944859533.

Adding to 21114856 its reverse (65841112), we get a palindrome (86955968).

The spelling of 21114856 in words is "twenty-one million, one hundred fourteen thousand, eight hundred fifty-six".