21970150 has 24 divisors (see below), whose sum is σ = 41738400. Its totient is φ = 8600160.

The previous prime is 21970147. The next prime is 21970181. The reversal of 21970150 is 5107912.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2325 + ... + 7024.

It is an arithmetic number, because the mean of its divisors is an integer number (1739100).

Almost surely, 2^21970150 is an apocalyptic number.

21970150 is a deficient number, since it is larger than the sum of its proper divisors (19768250).

21970150 is a wasteful number, since it uses less digits than its factorization.

21970150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408 (or 9403 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 21970150 is about 4687.2326590431. The cubic root of 21970150 is about 280.0771471094.

The spelling of 21970150 in words is "twenty-one million, nine hundred seventy thousand, one hundred fifty".