21695354692 has 72 divisors (see below), whose sum is σ = 42299873280. Its totient is φ = 9728136000.

The previous prime is 21695354683. The next prime is 21695354699. The reversal of 21695354692 is 29645359612.

It is not an unprimeable number, because it can be changed into a prime (21695354699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16962109 + ... + 16963387.

It is an arithmetic number, because the mean of its divisors is an integer number (587498240).

Almost surely, 2^21695354692 is an apocalyptic number.

21695354692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21695354692 is a deficient number, since it is larger than the sum of its proper divisors (20604518588).

21695354692 is a wasteful number, since it uses less digits than its factorization.

21695354692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753 (or 1740 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 52.

The spelling of 21695354692 in words is "twenty-one billion, six hundred ninety-five million, three hundred fifty-four thousand, six hundred ninety-two".