21882051 has 12 divisors (see below), whose sum is σ = 31839912. Its totient is φ = 14480736.

The previous prime is 21882031. The next prime is 21882061. The reversal of 21882051 is 15028812.

It is not a de Polignac number, because 21882051 - 2⁵ = 21882019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21882011) 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 11 ways as a sum of consecutive naturals, for example, 7641 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (2653326).

Almost surely, 2^21882051 is an apocalyptic number.

21882051 is a deficient number, since it is larger than the sum of its proper divisors (9957861).

21882051 is a wasteful number, since it uses less digits than its factorization.

21882051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17890 (or 17887 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 21882051 is about 4677.8254563419. The cubic root of 21882051 is about 279.7022813427.

The spelling of 21882051 in words is "twenty-one million, eight hundred eighty-two thousand, fifty-one".