21892965 has 8 divisors (see below), whose sum is σ = 35028768. Its totient is φ = 11676240.

The previous prime is 21892963. The next prime is 21892979. The reversal of 21892965 is 56929812.

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

It is not a de Polignac number, because 21892965 - 2¹ = 21892963 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21892963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729751 + ... + 729780.

It is an arithmetic number, because the mean of its divisors is an integer number (4378596).

Almost surely, 2^21892965 is an apocalyptic number.

It is an amenable number.

21892965 is a deficient number, since it is larger than the sum of its proper divisors (13135803).

21892965 is a wasteful number, since it uses less digits than its factorization.

21892965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459539.

The product of its digits is 77760, while the sum is 42.

The square root of 21892965 is about 4678.9918785995. The cubic root of 21892965 is about 279.7487755115.

The spelling of 21892965 in words is "twenty-one million, eight hundred ninety-two thousand, nine hundred sixty-five".