21025196 has 6 divisors (see below), whose sum is σ = 36794100. Its totient is φ = 10512596.

The previous prime is 21025189. The next prime is 21025201. The reversal of 21025196 is 69152012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628146 + ... + 2628153.

It is an arithmetic number, because the mean of its divisors is an integer number (6132350).

Almost surely, 2^21025196 is an apocalyptic number.

It is an amenable number.

21025196 is a deficient number, since it is larger than the sum of its proper divisors (15768904).

21025196 is a wasteful number, since it uses less digits than its factorization.

21025196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256303 (or 5256301 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 21025196 is about 4585.3239798296. The cubic root of 21025196 is about 276.0027129888.

It can be divided in two parts, 21025 and 196, that multiplied together give a square (4120900 = 2030²).

The spelling of 21025196 in words is "twenty-one million, twenty-five thousand, one hundred ninety-six".