21774053 has 4 divisors (see below), whose sum is σ = 24884640. Its totient is φ = 18663468.

The previous prime is 21774047. The next prime is 21774061. The reversal of 21774053 is 35047712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21774053 - 2¹⁰ = 21773029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21774073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555283 + ... + 1555296.

It is an arithmetic number, because the mean of its divisors is an integer number (6221160).

Almost surely, 2^21774053 is an apocalyptic number.

It is an amenable number.

21774053 is a deficient number, since it is larger than the sum of its proper divisors (3110587).

21774053 is an equidigital number, since it uses as much as digits as its factorization.

21774053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110586.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 21774053 is about 4666.2675662675. The cubic root of 21774053 is about 279.2413690435.

The spelling of 21774053 in words is "twenty-one million, seven hundred seventy-four thousand, fifty-three".