21336077 has 4 divisors (see below), whose sum is σ = 24384096. Its totient is φ = 18288060.

The previous prime is 21336061. The next prime is 21336103. The reversal of 21336077 is 77063312.

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 not a de Polignac number, because 21336077 - 2⁴ = 21336061 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 (21336017) 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, 1523999 + ... + 1524012.

It is an arithmetic number, because the mean of its divisors is an integer number (6096024).

Almost surely, 2^21336077 is an apocalyptic number.

It is an amenable number.

21336077 is a deficient number, since it is larger than the sum of its proper divisors (3048019).

21336077 is an equidigital number, since it uses as much as digits as its factorization.

21336077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048018.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 21336077 is about 4619.0991545971. The cubic root of 21336077 is about 277.3563989319.

Adding to 21336077 its reverse (77063312), we get a palindrome (98399389).

The spelling of 21336077 in words is "twenty-one million, three hundred thirty-six thousand, seventy-seven".