21471146147 has 8 divisors (see below), whose sum is σ = 23444992560. Its totient is φ = 19500953760.

The previous prime is 21471146117. The next prime is 21471146167. The reversal of 21471146147 is 74164117412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21471146147 - 2²⁶ = 21404037283 is a prime.

It is a super-2 number, since 2×21471146147² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21471146147.

It is not an unprimeable number, because it can be changed into a prime (21471146117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901208 + ... + 924725.

It is an arithmetic number, because the mean of its divisors is an integer number (2930624070).

Almost surely, 2^21471146147 is an apocalyptic number.

21471146147 is a deficient number, since it is larger than the sum of its proper divisors (1973846413).

21471146147 is a wasteful number, since it uses less digits than its factorization.

21471146147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827013.

The product of its digits is 37632, while the sum is 38.

The spelling of 21471146147 in words is "twenty-one billion, four hundred seventy-one million, one hundred forty-six thousand, one hundred forty-seven".