21299101870 has 16 divisors (see below), whose sum is σ = 38341371888. Its totient is φ = 8518976640.

The previous prime is 21299101853. The next prime is 21299101871. The reversal of 21299101870 is 7810199212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21299101871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64102 + ... + 216118.

It is an arithmetic number, because the mean of its divisors is an integer number (2396335743).

Almost surely, 2^21299101870 is an apocalyptic number.

21299101870 is a deficient number, since it is larger than the sum of its proper divisors (17042270018).

21299101870 is a wasteful number, since it uses less digits than its factorization.

21299101870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166035.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 21299101870 in words is "twenty-one billion, two hundred ninety-nine million, one hundred one thousand, eight hundred seventy".