21477622319 has 2 divisors, whose sum is σ = 21477622320. Its totient is φ = 21477622318.

The previous prime is 21477622301. The next prime is 21477622351. The reversal of 21477622319 is 91322677412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21477622319 - 2¹² = 21477618223 is a prime.

It is a super-2 number, since 2×21477622319² (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 21477622319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21477622379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738811159 + 10738811160.

It is an arithmetic number, because the mean of its divisors is an integer number (10738811160).

Almost surely, 2^21477622319 is an apocalyptic number.

21477622319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21477622319 is an equidigital number, since it uses as much as digits as its factorization.

21477622319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The spelling of 21477622319 in words is "twenty-one billion, four hundred seventy-seven million, six hundred twenty-two thousand, three hundred nineteen".