21896159232 has 56 divisors (see below), whose sum is σ = 58386259656. Its totient is φ = 7298711552.

The previous prime is 21896159179. The next prime is 21896159279. The reversal of 21896159232 is 23295169812.

It is a happy number.

It is a super-2 number, since 2×21896159232² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420903 + ... + 470054.

Almost surely, 2^21896159232 is an apocalyptic number.

It is an amenable number.

21896159232 is an abundant number, since it is smaller than the sum of its proper divisors (36490100424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21896159232 is an frugal number, since it uses more digits than its factorization.

21896159232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890986 (or 890962 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The spelling of 21896159232 in words is "twenty-one billion, eight hundred ninety-six million, one hundred fifty-nine thousand, two hundred thirty-two".