21832756372947 has 32 divisors (see below), whose sum is σ = 31639238128960. Its totient is φ = 13311427092480.

The previous prime is 21832756372927. The next prime is 21832756372949. The reversal of 21832756372947 is 74927365723812.

It is not a de Polignac number, because 21832756372947 - 2¹⁴ = 21832756356563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21832756372949) 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, 69632247 + ... + 69945087.

It is an arithmetic number, because the mean of its divisors is an integer number (988726191530).

Almost surely, 2^{21832756372947} is an apocalyptic number.

21832756372947 is a deficient number, since it is larger than the sum of its proper divisors (9806481756013).

21832756372947 is a wasteful number, since it uses less digits than its factorization.

21832756372947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329383.

The product of its digits is 213373440, while the sum is 66.

The spelling of 21832756372947 in words is "twenty-one trillion, eight hundred thirty-two billion, seven hundred fifty-six million, three hundred seventy-two thousand, nine hundred forty-seven".