21167340036 has 48 divisors (see below), whose sum is σ = 51556291584. Its totient is φ = 6746594976.

The previous prime is 21167340023. The next prime is 21167340037. The reversal of 21167340036 is 63004376112.

It is a junction number, because it is equal to n+sod(n) for n = 21167339979 and 21167340006.

It is not an unprimeable number, because it can be changed into a prime (21167340037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860865 + ... + 885111.

It is an arithmetic number, because the mean of its divisors is an integer number (1074089408).

Almost surely, 2^21167340036 is an apocalyptic number.

It is an amenable number.

21167340036 is an abundant number, since it is smaller than the sum of its proper divisors (30388951548).

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

21167340036 is a wasteful number, since it uses less digits than its factorization.

21167340036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27440 (or 27438 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 21167340036 in words is "twenty-one billion, one hundred sixty-seven million, three hundred forty thousand, thirty-six".