21959150 has 12 divisors (see below), whose sum is σ = 40844112. Its totient is φ = 8783640.

The previous prime is 21959143. The next prime is 21959159. The reversal of 21959150 is 5195912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21959159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219542 + ... + 219641.

It is an arithmetic number, because the mean of its divisors is an integer number (3403676).

Almost surely, 2^21959150 is an apocalyptic number.

21959150 is a deficient number, since it is larger than the sum of its proper divisors (18884962).

21959150 is a wasteful number, since it uses less digits than its factorization.

21959150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439195 (or 439190 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 21959150 is about 4686.0591118764. The cubic root of 21959150 is about 280.0303963600.

The spelling of 21959150 in words is "twenty-one million, nine hundred fifty-nine thousand, one hundred fifty".