21902950 has 24 divisors (see below), whose sum is σ = 41144688. Its totient is φ = 8674080.

The previous prime is 21902941. The next prime is 21902963. The reversal of 21902950 is 5920912.

It is a congruent number.

It is an unprimeable number.

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, 3024 + ... + 7276.

It is an arithmetic number, because the mean of its divisors is an integer number (1714362).

Almost surely, 2^21902950 is an apocalyptic number.

21902950 is a deficient number, since it is larger than the sum of its proper divisors (19241738).

21902950 is a wasteful number, since it uses less digits than its factorization.

21902950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4363 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 21902950 is about 4680.0587603149. The cubic root of 21902950 is about 279.7912985621.

The spelling of 21902950 in words is "twenty-one million, nine hundred two thousand, nine hundred fifty".