21077076 has 24 divisors (see below), whose sum is σ = 52073280. Its totient is φ = 6612352.

The previous prime is 21077057. The next prime is 21077081. The reversal of 21077076 is 67077012.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51456 + ... + 51863.

It is an arithmetic number, because the mean of its divisors is an integer number (2169720).

Almost surely, 2^21077076 is an apocalyptic number.

It is an amenable number.

21077076 is an abundant number, since it is smaller than the sum of its proper divisors (30996204).

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

21077076 is a wasteful number, since it uses less digits than its factorization.

21077076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103343 (or 103341 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 21077076 is about 4590.9776736551. The cubic root of 21077076 is about 276.2295401949.

The spelling of 21077076 in words is "twenty-one million, seventy-seven thousand, seventy-six".