21339950 has 12 divisors (see below), whose sum is σ = 39692400. Its totient is φ = 8535960.

The previous prime is 21339943. The next prime is 21339961. The reversal of 21339950 is 5993312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213350 + ... + 213449.

It is an arithmetic number, because the mean of its divisors is an integer number (3307700).

Almost surely, 2^21339950 is an apocalyptic number.

21339950 is a deficient number, since it is larger than the sum of its proper divisors (18352450).

21339950 is a wasteful number, since it uses less digits than its factorization.

21339950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426811 (or 426806 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 21339950 is about 4619.5183731640. The cubic root of 21339950 is about 277.3731801541.

The spelling of 21339950 in words is "twenty-one million, three hundred thirty-nine thousand, nine hundred fifty".