21485950 has 12 divisors (see below), whose sum is σ = 39963960. Its totient is φ = 8594360.

The previous prime is 21485929. The next prime is 21485957. The reversal of 21485950 is 5958412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214810 + ... + 214909.

It is an arithmetic number, because the mean of its divisors is an integer number (3330330).

Almost surely, 2^21485950 is an apocalyptic number.

21485950 is a deficient number, since it is larger than the sum of its proper divisors (18478010).

21485950 is a wasteful number, since it uses less digits than its factorization.

21485950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429731 (or 429726 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 21485950 is about 4635.2939496865. The cubic root of 21485950 is about 278.0043044034.

The spelling of 21485950 in words is "twenty-one million, four hundred eighty-five thousand, nine hundred fifty".