21907483 has 8 divisors (see below), whose sum is σ = 24354176. Its totient is φ = 19569600.

The previous prime is 21907471. The next prime is 21907493. The reversal of 21907483 is 38470912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21907483 is a prime.

It is a super-2 number, since 2×21907483² = 959875622790578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21907433) 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, 26778 + ... + 27583.

It is an arithmetic number, because the mean of its divisors is an integer number (3044272).

Almost surely, 2^21907483 is an apocalyptic number.

21907483 is a deficient number, since it is larger than the sum of its proper divisors (2446693).

21907483 is a wasteful number, since it uses less digits than its factorization.

21907483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54405.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 21907483 is about 4680.5430240518. The cubic root of 21907483 is about 279.8105989527.

The spelling of 21907483 in words is "twenty-one million, nine hundred seven thousand, four hundred eighty-three".