21776054 has 16 divisors (see below), whose sum is σ = 33884448. Its totient is φ = 10487232.

The previous prime is 21776039. The next prime is 21776059. The reversal of 21776054 is 45067712.

It is a self number, because there is not a number n which added to its sum of digits gives 21776054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21776059) 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, 6194 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (2117778).

Almost surely, 2^21776054 is an apocalyptic number.

21776054 is a deficient number, since it is larger than the sum of its proper divisors (12108394).

21776054 is a wasteful number, since it uses less digits than its factorization.

21776054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 21776054 is about 4666.4819725356. The cubic root of 21776054 is about 279.2499227238.

The spelling of 21776054 in words is "twenty-one million, seven hundred seventy-six thousand, fifty-four".