21077162 has 4 divisors (see below), whose sum is σ = 31615746. Its totient is φ = 10538580.

The previous prime is 21077129. The next prime is 21077167. The reversal of 21077162 is 26177012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20784481 + 292681 = 4559^2 + 541^2 .

It is not an unprimeable number, because it can be changed into a prime (21077167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5269289 + ... + 5269292.

Almost surely, 2^21077162 is an apocalyptic number.

21077162 is a deficient number, since it is larger than the sum of its proper divisors (10538584).

21077162 is a wasteful number, since it uses less digits than its factorization.

21077162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10538583.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 21077162 is about 4590.9870398423. The cubic root of 21077162 is about 276.2299158907.

The spelling of 21077162 in words is "twenty-one million, seventy-seven thousand, one hundred sixty-two".