21476053 has 2 divisors, whose sum is σ = 21476054. Its totient is φ = 21476052.

The previous prime is 21476051. The next prime is 21476107. The reversal of 21476053 is 35067412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13675204 + 7800849 = 3698^2 + 2793^2 .

It is a cyclic number.

It is not a de Polignac number, because 21476053 - 2¹ = 21476051 is a prime.

It is a super-2 number, since 2×21476053² = 922441704917618, which contains 22 as substring.

Together with 21476051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21476051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738026 + 10738027.

It is an arithmetic number, because the mean of its divisors is an integer number (10738027).

Almost surely, 2^21476053 is an apocalyptic number.

It is an amenable number.

21476053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476053 is an equidigital number, since it uses as much as digits as its factorization.

21476053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21476053 is about 4634.2262568847. The cubic root of 21476053 is about 277.9616124557.

It can be divided in two parts, 214 and 76053, that added together give a palindrome (76267).

The spelling of 21476053 in words is "twenty-one million, four hundred seventy-six thousand, fifty-three".