21469763 has 8 divisors (see below), whose sum is σ = 25328640. Its totient is φ = 17808840.

The previous prime is 21469757. The next prime is 21469783. The reversal of 21469763 is 36796412.

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

It is not a de Polignac number, because 21469763 - 2⁶ = 21469699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21469733) 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, 49253 + ... + 49686.

It is an arithmetic number, because the mean of its divisors is an integer number (3166080).

Almost surely, 2^21469763 is an apocalyptic number.

21469763 is a deficient number, since it is larger than the sum of its proper divisors (3858877).

21469763 is an equidigital number, since it uses as much as digits as its factorization.

21469763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98977.

The product of its digits is 54432, while the sum is 38.

The square root of 21469763 is about 4633.5475609947. The cubic root of 21469763 is about 277.9344729364.

The spelling of 21469763 in words is "twenty-one million, four hundred sixty-nine thousand, seven hundred sixty-three".