21077802 has 24 divisors (see below), whose sum is σ = 48072960. Its totient is φ = 6656040.

The previous prime is 21077779. The next prime is 21077803. The reversal of 21077802 is 20877012.

It is not an unprimeable number, because it can be changed into a prime (21077803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30474 + ... + 31157.

It is an arithmetic number, because the mean of its divisors is an integer number (2003040).

Almost surely, 2^21077802 is an apocalyptic number.

21077802 is an abundant number, since it is smaller than the sum of its proper divisors (26995158).

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

21077802 is a wasteful number, since it uses less digits than its factorization.

21077802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61658 (or 61655 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 21077802 is about 4591.0567411000. The cubic root of 21077802 is about 276.2327117345.

The spelling of 21077802 in words is "twenty-one million, seventy-seven thousand, eight hundred two".