21202877742 has 16 divisors (see below), whose sum is σ = 42417713280. Its totient is φ = 7065632952.

The previous prime is 21202877723. The next prime is 21202877767. The reversal of 21202877742 is 24777820212.

It is a junction number, because it is equal to n+sod(n) for n = 21202877694 and 21202877703.

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, 475108 + ... + 517815.

It is an arithmetic number, because the mean of its divisors is an integer number (2651107080).

Almost surely, 2^21202877742 is an apocalyptic number.

21202877742 is an abundant number, since it is smaller than the sum of its proper divisors (21214835538).

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

21202877742 is a wasteful number, since it uses less digits than its factorization.

21202877742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996487.

The product of its (nonzero) digits is 175616, while the sum is 42.

The spelling of 21202877742 in words is "twenty-one billion, two hundred two million, eight hundred seventy-seven thousand, seven hundred forty-two".