21777334 has 8 divisors (see below), whose sum is σ = 32718888. Its totient is φ = 10871040.

The previous prime is 21777293. The next prime is 21777341. The reversal of 21777334 is 43377712.

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

It is a super-2 number, since 2×21777334² = 948504552295112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21777334.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7212 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (4089861).

Almost surely, 2^21777334 is an apocalyptic number.

21777334 is a deficient number, since it is larger than the sum of its proper divisors (10941554).

21777334 is a wasteful number, since it uses less digits than its factorization.

21777334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17630.

The product of its digits is 24696, while the sum is 34.

The square root of 21777334 is about 4666.6191188054. The cubic root of 21777334 is about 279.2553940686.

The spelling of 21777334 in words is "twenty-one million, seven hundred seventy-seven thousand, three hundred thirty-four".