21777014 has 16 divisors (see below), whose sum is σ = 37704096. Its totient is φ = 9240000.

The previous prime is 21777013. The next prime is 21777023. The reversal of 21777014 is 41077712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21777013) 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, 6287 + ... + 9114.

It is an arithmetic number, because the mean of its divisors is an integer number (2356506).

Almost surely, 2^21777014 is an apocalyptic number.

21777014 is a deficient number, since it is larger than the sum of its proper divisors (15927082).

21777014 is a wasteful number, since it uses less digits than its factorization.

21777014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15511.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 21777014 is about 4666.5848326158. The cubic root of 21777014 is about 279.2540262525.

The spelling of 21777014 in words is "twenty-one million, seven hundred seventy-seven thousand, fourteen".