21095052 has 24 divisors (see below), whose sum is σ = 53696832. Its totient is φ = 6392400.

The previous prime is 21095051. The next prime is 21095059. The reversal of 21095052 is 25059012.

It is not an unprimeable number, because it can be changed into a prime (21095051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79774 + ... + 80037.

It is an arithmetic number, because the mean of its divisors is an integer number (2237368).

Almost surely, 2^21095052 is an apocalyptic number.

21095052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21095052 is an abundant number, since it is smaller than the sum of its proper divisors (32601780).

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

21095052 is a wasteful number, since it uses less digits than its factorization.

21095052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159829 (or 159827 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 21095052 is about 4592.9350093377. The cubic root of 21095052 is about 276.3080471510.

The spelling of 21095052 in words is "twenty-one million, ninety-five thousand, fifty-two".