21362988889156 has 12 divisors (see below), whose sum is σ = 37399082086800. Its totient is φ = 10677536864360.

The previous prime is 21362988889139. The next prime is 21362988889157. The reversal of 21362988889156 is 65198888926312.

It is not an unprimeable number, because it can be changed into a prime (21362988889157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989382910 + ... + 989404501.

It is an arithmetic number, because the mean of its divisors is an integer number (3116590173900).

Almost surely, 2^{21362988889156} is an apocalyptic number.

It is an amenable number.

21362988889156 is a deficient number, since it is larger than the sum of its proper divisors (16036093197644).

21362988889156 is a wasteful number, since it uses less digits than its factorization.

21362988889156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978790114 (or 1978790112 counting only the distinct ones).

The product of its digits is 716636160, while the sum is 76.

The spelling of 21362988889156 in words is "twenty-one trillion, three hundred sixty-two billion, nine hundred eighty-eight million, eight hundred eighty-nine thousand, one hundred fifty-six".