21908483 has 2 divisors, whose sum is σ = 21908484. Its totient is φ = 21908482.

The previous prime is 21908449. The next prime is 21908503. The reversal of 21908483 is 38480912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21908483 - 2¹⁴ = 21892099 is a prime.

It is a super-2 number, since 2×21908483² = 959963254722578, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21908423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10954241 + 10954242.

It is an arithmetic number, because the mean of its divisors is an integer number (10954242).

Almost surely, 2^21908483 is an apocalyptic number.

21908483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21908483 is an equidigital number, since it uses as much as digits as its factorization.

21908483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 21908483 is about 4680.6498480446. The cubic root of 21908483 is about 279.8148563464.

The spelling of 21908483 in words is "twenty-one million, nine hundred eight thousand, four hundred eighty-three".