21650097 has 8 divisors (see below), whose sum is σ = 32990656. Its totient is φ = 12371472.

The previous prime is 21650093. The next prime is 21650099. The reversal of 21650097 is 79005612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21650097 - 2² = 21650093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21650093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515458 + ... + 515499.

It is an arithmetic number, because the mean of its divisors is an integer number (4123832).

Almost surely, 2^21650097 is an apocalyptic number.

It is an amenable number.

21650097 is a deficient number, since it is larger than the sum of its proper divisors (11340559).

21650097 is a wasteful number, since it uses less digits than its factorization.

21650097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030967.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 21650097 is about 4652.9664731223. The cubic root of 21650097 is about 278.7104690334.

The spelling of 21650097 in words is "twenty-one million, six hundred fifty thousand, ninety-seven".