21770115612 has 48 divisors (see below), whose sum is σ = 61468565760. Its totient is φ = 5854148352.

The previous prime is 21770115571. The next prime is 21770115623. The reversal of 21770115612 is 21651107712.

It is a super-2 number, since 2×21770115612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7621162 + ... + 7624017.

It is an arithmetic number, because the mean of its divisors is an integer number (1280595120).

Almost surely, 2^21770115612 is an apocalyptic number.

It is an amenable number.

21770115612 is an abundant number, since it is smaller than the sum of its proper divisors (39698450148).

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

21770115612 is a wasteful number, since it uses less digits than its factorization.

21770115612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15245210 (or 15245208 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 33.

The spelling of 21770115612 in words is "twenty-one billion, seven hundred seventy million, one hundred fifteen thousand, six hundred twelve".