21969964467 has 48 divisors (see below), whose sum is σ = 36678197088. Its totient is φ = 12524221440.

The previous prime is 21969964453. The next prime is 21969964519. The reversal of 21969964467 is 76446996912.

21969964467 is a `hidden beast` number, since 21 + 9 + 6 + 99 + 64 + 467 = 666.

It is not a de Polignac number, because 21969964467 - 2⁷ = 21969964339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21969964447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3856273 + ... + 3861965.

It is an arithmetic number, because the mean of its divisors is an integer number (764129106).

Almost surely, 2^21969964467 is an apocalyptic number.

21969964467 is a deficient number, since it is larger than the sum of its proper divisors (14708232621).

21969964467 is a wasteful number, since it uses less digits than its factorization.

21969964467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020 (or 8017 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 21969964467 in words is "twenty-one billion, nine hundred sixty-nine million, nine hundred sixty-four thousand, four hundred sixty-seven".