21850607 has 2 divisors, whose sum is σ = 21850608. Its totient is φ = 21850606.

The previous prime is 21850603. The next prime is 21850637. The reversal of 21850607 is 70605812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21850607 - 2² = 21850603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21850607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21850603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10925303 + 10925304.

It is an arithmetic number, because the mean of its divisors is an integer number (10925304).

Almost surely, 2^21850607 is an apocalyptic number.

21850607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21850607 is an equidigital number, since it uses as much as digits as its factorization.

21850607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 21850607 is about 4674.4632846991. The cubic root of 21850607 is about 279.5682418870.

The spelling of 21850607 in words is "twenty-one million, eight hundred fifty thousand, six hundred seven".