21932345 has 8 divisors (see below), whose sum is σ = 27168000. Its totient is φ = 16979760.

The previous prime is 21932341. The next prime is 21932369. The reversal of 21932345 is 54323912.

21932345 = T₁₁₇₄ + T₁₁₇₅ + ... + T₁₂₀₄.

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

It is not a de Polignac number, because 21932345 - 2² = 21932341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21932341) 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, 70595 + ... + 70904.

It is an arithmetic number, because the mean of its divisors is an integer number (3396000).

Almost surely, 2^21932345 is an apocalyptic number.

It is an amenable number.

21932345 is a deficient number, since it is larger than the sum of its proper divisors (5235655).

21932345 is a wasteful number, since it uses less digits than its factorization.

21932345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141535.

The product of its digits is 6480, while the sum is 29.

The square root of 21932345 is about 4683.1981593778. The cubic root of 21932345 is about 279.9164078697.

The spelling of 21932345 in words is "twenty-one million, nine hundred thirty-two thousand, three hundred forty-five".