21077622 has 12 divisors (see below), whose sum is σ = 45668220. Its totient is φ = 7025868.

The previous prime is 21077599. The next prime is 21077627. The reversal of 21077622 is 22677012.

It is a super-2 number, since 2×21077622² = 888532298349768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21077627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 585472 + ... + 585507.

It is an arithmetic number, because the mean of its divisors is an integer number (3805685).

Almost surely, 2^21077622 is an apocalyptic number.

21077622 is an abundant number, since it is smaller than the sum of its proper divisors (24590598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21077622 is a wasteful number, since it uses less digits than its factorization.

21077622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170987 (or 1170984 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 21077622 is about 4591.0371377282. The cubic root of 21077622 is about 276.2319254092.

The spelling of 21077622 in words is "twenty-one million, seventy-seven thousand, six hundred twenty-two".