21310069 has 8 divisors (see below), whose sum is σ = 23788512. Its totient is φ = 18921840.

The previous prime is 21310063. The next prime is 21310073. The reversal of 21310069 is 96001312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310069 - 2¹³ = 21301877 is a prime.

It is a super-2 number, since 2×21310069² = 908238081569522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310063) 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, 22054 + ... + 22999.

It is an arithmetic number, because the mean of its divisors is an integer number (2973564).

Almost surely, 2^21310069 is an apocalyptic number.

It is an amenable number.

21310069 is a deficient number, since it is larger than the sum of its proper divisors (2478443).

21310069 is a wasteful number, since it uses less digits than its factorization.

21310069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45107.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 21310069 is about 4616.2830285848. The cubic root of 21310069 is about 277.2436568970.

The spelling of 21310069 in words is "twenty-one million, three hundred ten thousand, sixty-nine".