21077202 has 16 divisors (see below), whose sum is σ = 42748992. Its totient is φ = 6926640.

The previous prime is 21077201. The next prime is 21077257. The reversal of 21077202 is 20277012.

It is not an unprimeable number, because it can be changed into a prime (21077201) 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 in 7 ways as a sum of consecutive naturals, for example, 24313 + ... + 25164.

It is an arithmetic number, because the mean of its divisors is an integer number (2671812).

Almost surely, 2^21077202 is an apocalyptic number.

21077202 is an abundant number, since it is smaller than the sum of its proper divisors (21671790).

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

21077202 is a wasteful number, since it uses less digits than its factorization.

21077202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49553.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 21077202 is about 4590.9913962019. The cubic root of 21077202 is about 276.2300906326.

The spelling of 21077202 in words is "twenty-one million, seventy-seven thousand, two hundred two".