21850412 has 12 divisors (see below), whose sum is σ = 39471936. Its totient is φ = 10572720.

The previous prime is 21850393. The next prime is 21850429. The reversal of 21850412 is 21405812.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87983 + ... + 88230.

It is an arithmetic number, because the mean of its divisors is an integer number (3289328).

Almost surely, 2^21850412 is an apocalyptic number.

It is an amenable number.

21850412 is a deficient number, since it is larger than the sum of its proper divisors (17621524).

21850412 is a wasteful number, since it uses less digits than its factorization.

21850412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176248 (or 176246 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21850412 is about 4674.4424266430. The cubic root of 21850412 is about 279.5674102401.

The spelling of 21850412 in words is "twenty-one million, eight hundred fifty thousand, four hundred twelve".