21695499102 has 16 divisors (see below), whose sum is σ = 43678357632. Its totient is φ = 7183939800.

The previous prime is 21695499101. The next prime is 21695499131. The reversal of 21695499102 is 20199459612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21695499101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11972328 + ... + 11974139.

It is an arithmetic number, because the mean of its divisors is an integer number (2729897352).

Almost surely, 2^21695499102 is an apocalyptic number.

21695499102 is an abundant number, since it is smaller than the sum of its proper divisors (21982858530).

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

21695499102 is a wasteful number, since it uses less digits than its factorization.

21695499102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23946623.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 21695499102 in words is "twenty-one billion, six hundred ninety-five million, four hundred ninety-nine thousand, one hundred two".