21896372433 has 8 divisors (see below), whose sum is σ = 31440945088. Its totient is φ = 13474690704.

The previous prime is 21896372429. The next prime is 21896372441. The reversal of 21896372433 is 33427369812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21896372433 - 2² = 21896372429 is a prime.

It is a super-2 number, since 2×21896372433² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21896372423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 280722685 + ... + 280722762.

It is an arithmetic number, because the mean of its divisors is an integer number (3930118136).

Almost surely, 2^21896372433 is an apocalyptic number.

It is an amenable number.

21896372433 is a deficient number, since it is larger than the sum of its proper divisors (9544572655).

21896372433 is a wasteful number, since it uses less digits than its factorization.

21896372433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561445463.

The product of its digits is 1306368, while the sum is 48.

The spelling of 21896372433 in words is "twenty-one billion, eight hundred ninety-six million, three hundred seventy-two thousand, four hundred thirty-three".