21150023277 has 8 divisors (see below), whose sum is σ = 28225013440. Its totient is φ = 14087524320.

The previous prime is 21150023239. The next prime is 21150023371. The reversal of 21150023277 is 77232005112.

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

It is not a de Polignac number, because 21150023277 - 2¹⁰ = 21150022253 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 (21150023207) 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, 3118849 + ... + 3125622.

It is an arithmetic number, because the mean of its divisors is an integer number (3528126680).

Almost surely, 2^21150023277 is an apocalyptic number.

It is an amenable number.

21150023277 is a deficient number, since it is larger than the sum of its proper divisors (7074990163).

21150023277 is a wasteful number, since it uses less digits than its factorization.

21150023277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245603.

The product of its (nonzero) digits is 5880, while the sum is 30.

Adding to 21150023277 its reverse (77232005112), we get a palindrome (98382028389).

The spelling of 21150023277 in words is "twenty-one billion, one hundred fifty million, twenty-three thousand, two hundred seventy-seven".