21692688901 has 32 divisors (see below), whose sum is σ = 24998077440. Its totient is φ = 18670189824.

The previous prime is 21692688889. The next prime is 21692688961. The reversal of 21692688901 is 10988629612.

It is not a de Polignac number, because 21692688901 - 2⁵ = 21692688869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692688961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2483620 + ... + 2492338.

It is an arithmetic number, because the mean of its divisors is an integer number (781189920).

Almost surely, 2^21692688901 is an apocalyptic number.

It is an amenable number.

21692688901 is a deficient number, since it is larger than the sum of its proper divisors (3305388539).

21692688901 is a wasteful number, since it uses less digits than its factorization.

21692688901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 21692688901 in words is "twenty-one billion, six hundred ninety-two million, six hundred eighty-eight thousand, nine hundred one".