21896376 has 16 divisors (see below), whose sum is σ = 54741000. Its totient is φ = 7298784.

The previous prime is 21896339. The next prime is 21896387. The reversal of 21896376 is 67369812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456151 + ... + 456198.

Almost surely, 2^21896376 is an apocalyptic number.

It is an amenable number.

21896376 is an abundant number, since it is smaller than the sum of its proper divisors (32844624).

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

21896376 is a wasteful number, since it uses less digits than its factorization.

21896376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912358 (or 912354 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 21896376 is about 4679.3563659974. The cubic root of 21896376 is about 279.7633033674.

It can be divided in two parts, 2 and 1896376, that added together give a triangular number (1896378 = T₁₉₄₇).

The spelling of 21896376 in words is "twenty-one million, eight hundred ninety-six thousand, three hundred seventy-six".