21289691030 has 8 divisors (see below), whose sum is σ = 38321443872. Its totient is φ = 8515876408.

The previous prime is 21289691011. The next prime is 21289691053. The reversal of 21289691030 is 3019698212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064484542 + ... + 1064484561.

It is an arithmetic number, because the mean of its divisors is an integer number (4790180484).

Almost surely, 2^21289691030 is an apocalyptic number.

21289691030 is a deficient number, since it is larger than the sum of its proper divisors (17031752842).

21289691030 is a wasteful number, since it uses less digits than its factorization.

21289691030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128969110.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 21289691030 in words is "twenty-one billion, two hundred eighty-nine million, six hundred ninety-one thousand, thirty".