21017732102 has 8 divisors (see below), whose sum is σ = 31527777936. Its totient is φ = 10508472792.

The previous prime is 21017732089. The next prime is 21017732119. The reversal of 21017732102 is 20123771012.

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

It is a super-2 number, since 2×21017732102² (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 3 ways as a sum of consecutive naturals, for example, 124538 + ... + 239885.

It is an arithmetic number, because the mean of its divisors is an integer number (3940972242).

Almost surely, 2^21017732102 is an apocalyptic number.

21017732102 is a deficient number, since it is larger than the sum of its proper divisors (10510045834).

21017732102 is a wasteful number, since it uses less digits than its factorization.

21017732102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393262.

The product of its (nonzero) digits is 1176, while the sum is 26.

The spelling of 21017732102 in words is "twenty-one billion, seventeen million, seven hundred thirty-two thousand, one hundred two".