21692246129 has 4 divisors (see below), whose sum is σ = 21953598576. Its totient is φ = 21430893684.

The previous prime is 21692246099. The next prime is 21692246137. The reversal of 21692246129 is 92164229612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21692246129 - 2¹⁶ = 21692180593 is a prime.

It is a super-2 number, since 2×21692246129² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21692246129.

It is not an unprimeable number, because it can be changed into a prime (21692246179) 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 3 ways as a sum of consecutive naturals, for example, 130676099 + ... + 130676264.

It is an arithmetic number, because the mean of its divisors is an integer number (5488399644).

Almost surely, 2^21692246129 is an apocalyptic number.

It is an amenable number.

21692246129 is a deficient number, since it is larger than the sum of its proper divisors (261352447).

21692246129 is an equidigital number, since it uses as much as digits as its factorization.

21692246129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261352446.

The product of its digits is 186624, while the sum is 44.

The spelling of 21692246129 in words is "twenty-one billion, six hundred ninety-two million, two hundred forty-six thousand, one hundred twenty-nine".