21152950 has 48 divisors (see below), whose sum is σ = 48434400. Its totient is φ = 6693120.

The previous prime is 21152921. The next prime is 21152951. The reversal of 21152950 is 5925112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2226 + ... + 6874.

It is an arithmetic number, because the mean of its divisors is an integer number (1009050).

Almost surely, 2^21152950 is an apocalyptic number.

21152950 is an abundant number, since it is smaller than the sum of its proper divisors (27281450).

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

21152950 is a wasteful number, since it uses less digits than its factorization.

21152950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681 (or 4676 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 21152950 is about 4599.2336318130. The cubic root of 21152950 is about 276.5606035279.

The spelling of 21152950 in words is "twenty-one million, one hundred fifty-two thousand, nine hundred fifty".