21301377 has 8 divisors (see below), whose sum is σ = 28826016. Its totient is φ = 13988832.

The previous prime is 21301363. The next prime is 21301403. The reversal of 21301377 is 77310312.

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

It is not a de Polignac number, because 21301377 - 2⁴ = 21301361 is a prime.

It is a super-2 number, since 2×21301377² = 907497324192258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21301277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52788 + ... + 53189.

It is an arithmetic number, because the mean of its divisors is an integer number (3603252).

Almost surely, 2^21301377 is an apocalyptic number.

It is an amenable number.

21301377 is a deficient number, since it is larger than the sum of its proper divisors (7524639).

21301377 is a wasteful number, since it uses less digits than its factorization.

21301377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106047.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 21301377 is about 4615.3414824908. The cubic root of 21301377 is about 277.2059575106.

Adding to 21301377 its reverse (77310312), we get a palindrome (98611689).

The spelling of 21301377 in words is "twenty-one million, three hundred one thousand, three hundred seventy-seven".