21838531467 has 24 divisors (see below), whose sum is σ = 31722608640. Its totient is φ = 13347808560.

The previous prime is 21838531427. The next prime is 21838531511. The reversal of 21838531467 is 76413583812.

It is not a de Polignac number, because 21838531467 - 2⁷ = 21838531339 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21838531417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291667 + ... + 358812.

It is an arithmetic number, because the mean of its divisors is an integer number (1321775360).

Almost surely, 2^21838531467 is an apocalyptic number.

21838531467 is a deficient number, since it is larger than the sum of its proper divisors (9884077173).

21838531467 is a wasteful number, since it uses less digits than its factorization.

21838531467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650551 (or 650532 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The spelling of 21838531467 in words is "twenty-one billion, eight hundred thirty-eight million, five hundred thirty-one thousand, four hundred sixty-seven".