21069763 has 8 divisors (see below), whose sum is σ = 24753456. Its totient is φ = 17680800.

The previous prime is 21069757. The next prime is 21069781. The reversal of 21069763 is 36796012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21069763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21069703) 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, 73528 + ... + 73813.

It is an arithmetic number, because the mean of its divisors is an integer number (3094182).

Almost surely, 2^21069763 is an apocalyptic number.

21069763 is a deficient number, since it is larger than the sum of its proper divisors (3683693).

21069763 is a wasteful number, since it uses less digits than its factorization.

21069763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147365.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 21069763 is about 4590.1811511094. The cubic root of 21069763 is about 276.1975892054.

The spelling of 21069763 in words is "twenty-one million, sixty-nine thousand, seven hundred sixty-three".