21170427762 has 16 divisors (see below), whose sum is σ = 46190024352. Its totient is φ = 6415281120.

The previous prime is 21170427739. The next prime is 21170427781. The reversal of 21170427762 is 26772407112.

It is a self number, because there is not a number n which added to its sum of digits gives 21170427762.

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, 160381963 + ... + 160382094.

It is an arithmetic number, because the mean of its divisors is an integer number (2886876522).

Almost surely, 2^21170427762 is an apocalyptic number.

21170427762 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21170427762 is an abundant number, since it is smaller than the sum of its proper divisors (25019596590).

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

21170427762 is a wasteful number, since it uses less digits than its factorization.

21170427762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320764073.

The product of its (nonzero) digits is 65856, while the sum is 39.

The spelling of 21170427762 in words is "twenty-one billion, one hundred seventy million, four hundred twenty-seven thousand, seven hundred sixty-two".