21314769 has 8 divisors (see below), whose sum is σ = 32479680. Its totient is φ = 12179856.

The previous prime is 21314749. The next prime is 21314771. The reversal of 21314769 is 96741312.

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

It is not a de Polignac number, because 21314769 - 2¹¹ = 21312721 is a prime.

It is a super-2 number, since 2×21314769² = 908638755046722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21314729) 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, 507474 + ... + 507515.

It is an arithmetic number, because the mean of its divisors is an integer number (4059960).

Almost surely, 2^21314769 is an apocalyptic number.

It is an amenable number.

21314769 is a deficient number, since it is larger than the sum of its proper divisors (11164911).

21314769 is a wasteful number, since it uses less digits than its factorization.

21314769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014999.

The product of its digits is 9072, while the sum is 33.

The square root of 21314769 is about 4616.7920680923. The cubic root of 21314769 is about 277.2640377070.

The spelling of 21314769 in words is "twenty-one million, three hundred fourteen thousand, seven hundred sixty-nine".