21629864147 has 2 divisors, whose sum is σ = 21629864148. Its totient is φ = 21629864146.

The previous prime is 21629864129. The next prime is 21629864203. The reversal of 21629864147 is 74146892612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21629864147 - 2²⁴ = 21613086931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21629864095 and 21629864104.

It is not a weakly prime, because it can be changed into another prime (21629864747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10814932073 + 10814932074.

It is an arithmetic number, because the mean of its divisors is an integer number (10814932074).

Almost surely, 2^21629864147 is an apocalyptic number.

21629864147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21629864147 is an equidigital number, since it uses as much as digits as its factorization.

21629864147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The spelling of 21629864147 in words is "twenty-one billion, six hundred twenty-nine million, eight hundred sixty-four thousand, one hundred forty-seven".