21170010700 has 18 divisors (see below), whose sum is σ = 45938923436. Its totient is φ = 8468004240.

The previous prime is 21170010689. The next prime is 21170010707. The reversal of 21170010700 is 701007112.

It is a super-2 number, since 2×21170010700² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21170010707) 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 5 ways as a sum of consecutive naturals, for example, 105849954 + ... + 105850153.

Almost surely, 2^21170010700 is an apocalyptic number.

21170010700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21170010700 is an abundant number, since it is smaller than the sum of its proper divisors (24768912736).

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

21170010700 is a wasteful number, since it uses less digits than its factorization.

21170010700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211700121 (or 211700114 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 19.

Adding to 21170010700 its reverse (701007112), we get a palindrome (21871017812).

The spelling of 21170010700 in words is "twenty-one billion, one hundred seventy million, ten thousand, seven hundred".