21142050 has 48 divisors (see below), whose sum is σ = 55523232. Its totient is φ = 5305600.

The previous prime is 21142021. The next prime is 21142061. The reversal of 21142050 is 5024112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1596 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (1156734).

Almost surely, 2^21142050 is an apocalyptic number.

21142050 is an abundant number, since it is smaller than the sum of its proper divisors (34381182).

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

21142050 is a wasteful number, since it uses less digits than its factorization.

21142050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323 (or 8318 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21142050 is about 4598.0484990918. The cubic root of 21142050 is about 276.5130919749.

Adding to 21142050 its reverse (5024112), we get a palindrome (26166162).

The spelling of 21142050 in words is "twenty-one million, one hundred forty-two thousand, fifty".