21769011 has 12 divisors (see below), whose sum is σ = 34302840. Its totient is φ = 13193280.

The previous prime is 21768997. The next prime is 21769039. The reversal of 21769011 is 11096712.

It is not a de Polignac number, because 21769011 - 2⁷ = 21768883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21769211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109846 + ... + 110043.

It is an arithmetic number, because the mean of its divisors is an integer number (2858570).

Almost surely, 2^21769011 is an apocalyptic number.

21769011 is a deficient number, since it is larger than the sum of its proper divisors (12533829).

21769011 is a wasteful number, since it uses less digits than its factorization.

21769011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219906 (or 219903 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 21769011 is about 4665.7272744986. The cubic root of 21769011 is about 279.2198136679.

The spelling of 21769011 in words is "twenty-one million, seven hundred sixty-nine thousand, eleven".