21692745147 has 8 divisors (see below), whose sum is σ = 28925906944. Its totient is φ = 14460706728.

The previous prime is 21692745119. The next prime is 21692745149. The reversal of 21692745147 is 74154729612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21692745147 - 2⁸ = 21692744891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21692745096 and 21692745105.

It is not an unprimeable number, because it can be changed into a prime (21692745149) 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 7 ways as a sum of consecutive naturals, for example, 234703 + ... + 313800.

It is an arithmetic number, because the mean of its divisors is an integer number (3615738368).

Almost surely, 2^21692745147 is an apocalyptic number.

21692745147 is a deficient number, since it is larger than the sum of its proper divisors (7233161797).

21692745147 is a wasteful number, since it uses less digits than its factorization.

21692745147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561689.

The product of its digits is 846720, while the sum is 48.

The spelling of 21692745147 in words is "twenty-one billion, six hundred ninety-two million, seven hundred forty-five thousand, one hundred forty-seven".