21089841762 has 32 divisors (see below), whose sum is σ = 46021898304. Its totient is φ = 6389792000.

The previous prime is 21089841761. The next prime is 21089841769. The reversal of 21089841762 is 26714898012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21089841761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429262 + ... + 475862.

It is an arithmetic number, because the mean of its divisors is an integer number (1438184322).

Almost surely, 2^21089841762 is an apocalyptic number.

21089841762 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21089841762 is an abundant number, since it is smaller than the sum of its proper divisors (24932056542).

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

21089841762 is a wasteful number, since it uses less digits than its factorization.

21089841762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53474.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 21089841762 in words is "twenty-one billion, eighty-nine million, eight hundred forty-one thousand, seven hundred sixty-two".