21867617432 has 16 divisors (see below), whose sum is σ = 41874161760. Its totient is φ = 10701174304.

The previous prime is 21867617411. The next prime is 21867617437. The reversal of 21867617432 is 23471676812.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21867617437) 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 3 ways as a sum of consecutive naturals, for example, 29078903 + ... + 29079654.

It is an arithmetic number, because the mean of its divisors is an integer number (2617135110).

Almost surely, 2^21867617432 is an apocalyptic number.

It is an amenable number.

21867617432 is a deficient number, since it is larger than the sum of its proper divisors (20006544328).

21867617432 is a wasteful number, since it uses less digits than its factorization.

21867617432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58158610 (or 58158606 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The spelling of 21867617432 in words is "twenty-one billion, eight hundred sixty-seven million, six hundred seventeen thousand, four hundred thirty-two".